18578852794 has 8 divisors (see below), whose sum is σ = 28045784628. Its totient is φ = 9230257920.

The previous prime is 18578852689. The next prime is 18578852839. The reversal of 18578852794 is 49725887581.

It can be written as a sum of positive squares in 2 ways, for example, as 18386004025 + 192848769 = 135595^2 + 13887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18578852794² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29583847 + ... + 29584474.

Almost surely, 2^18578852794 is an apocalyptic number.

18578852794 is a deficient number, since it is larger than the sum of its proper divisors (9466931834).

18578852794 is a wasteful number, since it uses less digits than its factorization.

18578852794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59168480.

The product of its digits is 45158400, while the sum is 64.

The spelling of 18578852794 in words is "eighteen billion, five hundred seventy-eight million, eight hundred fifty-two thousand, seven hundred ninety-four".