21157436368110 has 64 divisors (see below), whose sum is σ = 58110996183552. Its totient is φ = 4829387895936.

The previous prime is 21157436368099. The next prime is 21157436368121. The reversal of 21157436368110 is 1186363475112.

It is an interprime number because it is at equal distance from previous prime (21157436368099) and next prime (21157436368121).

It is a super-2 number, since 2×21157436368110² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21157436368110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68570284 + ... + 68878143.

It is an arithmetic number, because the mean of its divisors is an integer number (907984315368).

Almost surely, 2^{21157436368110} is an apocalyptic number.

21157436368110 is an abundant number, since it is smaller than the sum of its proper divisors (36953559815442).

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

21157436368110 is a wasteful number, since it uses less digits than its factorization.

21157436368110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137449177.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 21157436368110 in words is "twenty-one trillion, one hundred fifty-seven billion, four hundred thirty-six million, three hundred sixty-eight thousand, one hundred ten".