10212020020 has 24 divisors (see below), whose sum is σ = 22706727624. Its totient is φ = 3844525056.

The previous prime is 10212020011. The next prime is 10212020023. The reversal of 10212020020 is 2002021201.

It can be written as a sum of positive squares in 4 ways, for example, as 2378707984 + 7833312036 = 48772^2 + 88506^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10212019979 and 10212020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212020023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15017337 + ... + 15018016.

It is an arithmetic number, because the mean of its divisors is an integer number (946113651).

Almost surely, 2^10212020020 is an apocalyptic number.

10212020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212020020 is an abundant number, since it is smaller than the sum of its proper divisors (12494707604).

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

10212020020 is a wasteful number, since it uses less digits than its factorization.

10212020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30035379 (or 30035377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 10212020020 its reverse (2002021201), we get a palindrome (12214041221).

The spelling of 10212020020 in words is "ten billion, two hundred twelve million, twenty thousand, twenty".