20656257017674 has 8 divisors (see below), whose sum is σ = 31357691376480. Its totient is φ = 10203693225516.

The previous prime is 20656257017573. The next prime is 20656257017707. The reversal of 20656257017674 is 47671075265602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62217641454 + ... + 62217641785.

It is an arithmetic number, because the mean of its divisors is an integer number (3919711422060).

Almost surely, 2^{20656257017674} is an apocalyptic number.

20656257017674 is a deficient number, since it is larger than the sum of its proper divisors (10701434358806).

20656257017674 is a wasteful number, since it uses less digits than its factorization.

20656257017674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124435283324.

The product of its (nonzero) digits is 29635200, while the sum is 58.

The spelling of 20656257017674 in words is "twenty trillion, six hundred fifty-six billion, two hundred fifty-seven million, seventeen thousand, six hundred seventy-four".