21506740254274 has 96 divisors (see below), whose sum is σ = 37877247475200. Its totient is φ = 9131386387200.

The previous prime is 21506740254239. The next prime is 21506740254289. The reversal of 21506740254274 is 47245204760512.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 796031214 + ... + 796058230.

It is an arithmetic number, because the mean of its divisors is an integer number (394554661200).

Almost surely, 2^{21506740254274} is an apocalyptic number.

21506740254274 is a deficient number, since it is larger than the sum of its proper divisors (16370507220926).

21506740254274 is a wasteful number, since it uses less digits than its factorization.

21506740254274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30760 (or 30749 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 21506740254274 in words is "twenty-one trillion, five hundred six billion, seven hundred forty million, two hundred fifty-four thousand, two hundred seventy-four".