21755862674 has 32 divisors (see below), whose sum is σ = 40173477120. Its totient is φ = 8604827712.

The previous prime is 21755862673. The next prime is 21755862691. The reversal of 21755862674 is 47626855712.

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 not an unprimeable number, because it can be changed into a prime (21755862673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059812 + ... + 1080144.

It is an arithmetic number, because the mean of its divisors is an integer number (1255421160).

Almost surely, 2^21755862674 is an apocalyptic number.

21755862674 is a deficient number, since it is larger than the sum of its proper divisors (18417614446).

21755862674 is a wasteful number, since it uses less digits than its factorization.

21755862674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26234.

The product of its digits is 5644800, while the sum is 53.

The spelling of 21755862674 in words is "twenty-one billion, seven hundred fifty-five million, eight hundred sixty-two thousand, six hundred seventy-four".