21374106775 has 12 divisors (see below), whose sum is σ = 30290162992. Its totient is φ = 14656530240.

The previous prime is 21374106737. The next prime is 21374106811. The reversal of 21374106775 is 57760147312.

It is a happy number.

It is not a de Polignac number, because 21374106775 - 2¹¹ = 21374104727 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61068702 + ... + 61069051.

Almost surely, 2^21374106775 is an apocalyptic number.

21374106775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21374106775 is a deficient number, since it is larger than the sum of its proper divisors (8916056217).

21374106775 is a wasteful number, since it uses less digits than its factorization.

21374106775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122137770 (or 122137765 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 21374106775 in words is "twenty-one billion, three hundred seventy-four million, one hundred six thousand, seven hundred seventy-five".