20210231104020 has 144 divisors (see below), whose sum is σ = 61554560558400. Its totient is φ = 5367404160000.

The previous prime is 20210231103943. The next prime is 20210231104067. The reversal of 20210231104020 is 2040113201202.

It is a happy number.

20210231104020 is a `hidden beast` number, since 2 + 0 + 21 + 0 + 231 + 10 + 402 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20210231103984 and 20210231104002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 772519740 + ... + 772545900.

It is an arithmetic number, because the mean of its divisors is an integer number (427462226100).

Almost surely, 2^{20210231104020} is an apocalyptic number.

20210231104020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210231104020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30777280279200).

20210231104020 is an abundant number, since it is smaller than the sum of its proper divisors (41344329454380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210231104020 is a wasteful number, since it uses less digits than its factorization.

20210231104020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43526 (or 43521 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20210231104020 its reverse (2040113201202), we get a palindrome (22250344305222).

The spelling of 20210231104020 in words is "twenty trillion, two hundred ten billion, two hundred thirty-one million, one hundred four thousand, twenty".