21455634436104 has 32 divisors (see below), whose sum is σ = 58515366644640. Its totient is φ = 6501707404800.

The previous prime is 21455634436007. The next prime is 21455634436141. The reversal of 21455634436104 is 40163443655412.

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, 40635671017 + ... + 40635671544.

It is an arithmetic number, because the mean of its divisors is an integer number (1828605207645).

Almost surely, 2^{21455634436104} is an apocalyptic number.

21455634436104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21455634436104 is an abundant number, since it is smaller than the sum of its proper divisors (37059732208536).

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

21455634436104 is a wasteful number, since it uses less digits than its factorization.

21455634436104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81271342581 (or 81271342577 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 21455634436104 in words is "twenty-one trillion, four hundred fifty-five billion, six hundred thirty-four million, four hundred thirty-six thousand, one hundred four".