20402564952 has 128 divisors (see below), whose sum is σ = 66939494400. Its totient is φ = 5020444800.

The previous prime is 20402564929. The next prime is 20402564953. The reversal of 20402564952 is 25946520402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402564952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402564953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255424 + ... + 325647.

It is an arithmetic number, because the mean of its divisors is an integer number (522964800).

Almost surely, 2^20402564952 is an apocalyptic number.

20402564952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20402564952 is an abundant number, since it is smaller than the sum of its proper divisors (46536929448).

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

20402564952 is a wasteful number, since it uses less digits than its factorization.

20402564952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581117 (or 581113 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20402564952 in words is "twenty billion, four hundred two million, five hundred sixty-four thousand, nine hundred fifty-two".