21507006365371 has 16 divisors (see below), whose sum is σ = 22499845632000. Its totient is φ = 20519041779808.

The previous prime is 21507006365357. The next prime is 21507006365387. The reversal of 21507006365371 is 17356360070512.

It is a de Polignac number, because none of the positive numbers 2^k-21507006365371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21507006362371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14574870 + ... + 15982516.

It is an arithmetic number, because the mean of its divisors is an integer number (1406240352000).

Almost surely, 2^{21507006365371} is an apocalyptic number.

21507006365371 is a deficient number, since it is larger than the sum of its proper divisors (992839266629).

21507006365371 is a wasteful number, since it uses less digits than its factorization.

21507006365371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409378.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 21507006365371 in words is "twenty-one trillion, five hundred seven billion, six million, three hundred sixty-five thousand, three hundred seventy-one".