20401010420 has 96 divisors (see below), whose sum is σ = 51512751360. Its totient is φ = 6639528960.

The previous prime is 20401010387. The next prime is 20401010449. The reversal of 20401010420 is 2401010402.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20401010395 and 20401010404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164351 + ... + 260409.

It is an arithmetic number, because the mean of its divisors is an integer number (536591160).

Almost surely, 2^20401010420 is an apocalyptic number.

20401010420 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 20401010420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25756375680).

20401010420 is an abundant number, since it is smaller than the sum of its proper divisors (31111740940).

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

20401010420 is a wasteful number, since it uses less digits than its factorization.

20401010420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96153 (or 96151 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20401010420 its reverse (2401010402), we get a palindrome (22802020822).

The spelling of 20401010420 in words is "twenty billion, four hundred one million, ten thousand, four hundred twenty".