21627434875456 has 56 divisors (see below), whose sum is σ = 42936174955520. Its totient is φ = 10808872492032.

The previous prime is 21627434875447. The next prime is 21627434875471. The reversal of 21627434875456 is 65457843472612.

It is a Harshad number since it is a multiple of its sum of digits (64).

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, 2508105961 + ... + 2508114583.

It is an arithmetic number, because the mean of its divisors is an integer number (766717409920).

Almost surely, 2^{21627434875456} is an apocalyptic number.

It is an amenable number.

21627434875456 is a deficient number, since it is larger than the sum of its proper divisors (21308740080064).

21627434875456 is an equidigital number, since it uses as much as digits as its factorization.

21627434875456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21651 (or 21641 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 64.

The spelling of 21627434875456 in words is "twenty-one trillion, six hundred twenty-seven billion, four hundred thirty-four million, eight hundred seventy-five thousand, four hundred fifty-six".