21502544051032 has 64 divisors (see below), whose sum is σ = 44923078794240. Its totient is φ = 9564905414400.

The previous prime is 21502544051017. The next prime is 21502544051057. The reversal of 21502544051032 is 23015044520512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39064188 + ... + 39610804.

It is an arithmetic number, because the mean of its divisors is an integer number (701923106160).

Almost surely, 2^{21502544051032} is an apocalyptic number.

21502544051032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21502544051032 is an abundant number, since it is smaller than the sum of its proper divisors (23420534743208).

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

21502544051032 is a wasteful number, since it uses less digits than its factorization.

21502544051032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556192 (or 556188 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 21502544051032 its reverse (23015044520512), we get a palindrome (44517588571544).

The spelling of 21502544051032 in words is "twenty-one trillion, five hundred two billion, five hundred forty-four million, fifty-one thousand, thirty-two".