21125536074 has 32 divisors (see below), whose sum is σ = 46990944000. Its totient is φ = 7035049152.

The previous prime is 21125536067. The next prime is 21125536093. The reversal of 21125536074 is 47063552112.

21125536074 is a `hidden beast` number, since 2 + 112 + 5 + 536 + 0 + 7 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132159 + ... + 244370.

It is an arithmetic number, because the mean of its divisors is an integer number (1468467000).

Almost surely, 2^21125536074 is an apocalyptic number.

21125536074 is an abundant number, since it is smaller than the sum of its proper divisors (25865407926).

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

21125536074 is a wasteful number, since it uses less digits than its factorization.

21125536074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377579 (or 377573 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 21125536074 in words is "twenty-one billion, one hundred twenty-five million, five hundred thirty-six thousand, seventy-four".