21507526503012 has 24 divisors (see below), whose sum is σ = 54746431098912. Its totient is φ = 6517432273600.

The previous prime is 21507526502981. The next prime is 21507526503019. The reversal of 21507526503012 is 21030562570512.

It is not an unprimeable number, because it can be changed into a prime (21507526503019) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 81467903289 + ... + 81467903552.

It is an arithmetic number, because the mean of its divisors is an integer number (2281101295788).

Almost surely, 2^{21507526503012} is an apocalyptic number.

21507526503012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21507526503012 is an abundant number, since it is smaller than the sum of its proper divisors (33238904595900).

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

21507526503012 is a wasteful number, since it uses less digits than its factorization.

21507526503012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162935806859 (or 162935806857 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 21507526503012 in words is "twenty-one trillion, five hundred seven billion, five hundred twenty-six million, five hundred three thousand, twelve".