21507526504004 has 24 divisors (see below), whose sum is σ = 38434890795840. Its totient is φ = 10527045168224.

The previous prime is 21507526504003. The next prime is 21507526504031. The reversal of 21507526504004 is 40040562570512.

It is not an unprimeable number, because it can be changed into a prime (21507526504003) 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, 114410144 + ... + 114597975.

It is an arithmetic number, because the mean of its divisors is an integer number (1601453783160).

Almost surely, 2^{21507526504004} is an apocalyptic number.

It is an amenable number.

21507526504004 is a deficient number, since it is larger than the sum of its proper divisors (16927364291836).

21507526504004 is a wasteful number, since it uses less digits than its factorization.

21507526504004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229008619 (or 229008617 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 21507526504004 in words is "twenty-one trillion, five hundred seven billion, five hundred twenty-six million, five hundred four thousand, four".