18996159408 has 20 divisors (see below), whose sum is σ = 49073411928. Its totient is φ = 6332053120.

The previous prime is 18996159367. The next prime is 18996159419. The reversal of 18996159408 is 80495169981.

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, 197876613 + ... + 197876708.

Almost surely, 2^18996159408 is an apocalyptic number.

It is an amenable number.

18996159408 is an abundant number, since it is smaller than the sum of its proper divisors (30077252520).

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

18996159408 is a wasteful number, since it uses less digits than its factorization.

18996159408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395753332 (or 395753326 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 60.

The spelling of 18996159408 in words is "eighteen billion, nine hundred ninety-six million, one hundred fifty-nine thousand, four hundred eight".