21523502125500 has 48 divisors (see below), whose sum is σ = 62676438193824. Its totient is φ = 5739600566400.

The previous prime is 21523502125471. The next prime is 21523502125519. The reversal of 21523502125500 is 552120532512.

It is a super-2 number, since 2×21523502125500² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7174499209 + ... + 7174502208.

It is an arithmetic number, because the mean of its divisors is an integer number (1305759129038).

Almost surely, 2^{21523502125500} is an apocalyptic number.

21523502125500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21523502125500 is an abundant number, since it is smaller than the sum of its proper divisors (41152936068324).

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

21523502125500 is a wasteful number, since it uses less digits than its factorization.

21523502125500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14349001439 (or 14349001427 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 21523502125500 in words is "twenty-one trillion, five hundred twenty-three billion, five hundred two million, one hundred twenty-five thousand, five hundred".