21365627166472 has 32 divisors (see below), whose sum is σ = 40759235640000. Its totient is φ = 10496672705728.

The previous prime is 21365627166451. The next prime is 21365627166473. The reversal of 21365627166472 is 27466172656312.

It is not an unprimeable number, because it can be changed into a prime (21365627166473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9962572 + ... + 11915707.

It is an arithmetic number, because the mean of its divisors is an integer number (1273726113750).

Almost surely, 2^{21365627166472} is an apocalyptic number.

It is an amenable number.

21365627166472 is a deficient number, since it is larger than the sum of its proper divisors (19393608473528).

21365627166472 is a wasteful number, since it uses less digits than its factorization.

21365627166472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21880413 (or 21880409 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 58.

The spelling of 21365627166472 in words is "twenty-one trillion, three hundred sixty-five billion, six hundred twenty-seven million, one hundred sixty-six thousand, four hundred seventy-two".