21036565010128 has 40 divisors (see below), whose sum is σ = 43901277068000. Its totient is φ = 9732951736704.

The previous prime is 21036565010113. The next prime is 21036565010141. The reversal of 21036565010128 is 82101056563012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804629103 + ... + 804655246.

It is an arithmetic number, because the mean of its divisors is an integer number (1097531926700).

Almost surely, 2^{21036565010128} is an apocalyptic number.

It is an amenable number.

21036565010128 is an abundant number, since it is smaller than the sum of its proper divisors (22864712057872).

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

21036565010128 is a wasteful number, since it uses less digits than its factorization.

21036565010128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609284419 (or 1609284413 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 21036565010128 in words is "twenty-one trillion, thirty-six billion, five hundred sixty-five million, ten thousand, one hundred twenty-eight".