21118567674 has 16 divisors (see below), whose sum is σ = 42392995200. Its totient is φ = 7013545920.

The previous prime is 21118567667. The next prime is 21118567681. The reversal of 21118567674 is 47676581112.

It is an interprime number because it is at equal distance from previous prime (21118567667) and next prime (21118567681).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6492399 + ... + 6495650.

It is an arithmetic number, because the mean of its divisors is an integer number (2649562200).

Almost surely, 2^21118567674 is an apocalyptic number.

21118567674 is an abundant number, since it is smaller than the sum of its proper divisors (21274427526).

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

21118567674 is a wasteful number, since it uses less digits than its factorization.

21118567674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12988325.

The product of its digits is 564480, while the sum is 48.

The spelling of 21118567674 in words is "twenty-one billion, one hundred eighteen million, five hundred sixty-seven thousand, six hundred seventy-four".