21612634626734 has 16 divisors (see below), whose sum is σ = 33452936725776. Its totient is φ = 10464424084800.

The previous prime is 21612634626721. The next prime is 21612634626749. The reversal of 21612634626734 is 43762643621612.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 692075927 + ... + 692107154.

It is an arithmetic number, because the mean of its divisors is an integer number (2090808545361).

Almost surely, 2^{21612634626734} is an apocalyptic number.

21612634626734 is a deficient number, since it is larger than the sum of its proper divisors (11840302099042).

21612634626734 is a wasteful number, since it uses less digits than its factorization.

21612634626734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384183331.

The product of its digits is 10450944, while the sum is 53.

The spelling of 21612634626734 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty-four million, six hundred twenty-six thousand, seven hundred thirty-four".