20318718574 has 48 divisors (see below), whose sum is σ = 38997086256. Its totient is φ = 7916333040.

The previous prime is 20318718559. The next prime is 20318718643. The reversal of 20318718574 is 47581781302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52552 + ... + 208324.

It is an arithmetic number, because the mean of its divisors is an integer number (812439297).

Almost surely, 2^20318718574 is an apocalyptic number.

20318718574 is a deficient number, since it is larger than the sum of its proper divisors (18678367682).

20318718574 is a wasteful number, since it uses less digits than its factorization.

20318718574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155822 (or 155793 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 20318718574 in words is "twenty billion, three hundred eighteen million, seven hundred eighteen thousand, five hundred seventy-four".