18491279104 has 36 divisors (see below), whose sum is σ = 38852985640. Its totient is φ = 8759024640.

The previous prime is 18491279101. The next prime is 18491279113. The reversal of 18491279104 is 40197219481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18491279101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895967 + ... + 1905694.

Almost surely, 2^18491279104 is an apocalyptic number.

It is an amenable number.

18491279104 is an abundant number, since it is smaller than the sum of its proper divisors (20361706536).

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

18491279104 is an equidigital number, since it uses as much as digits as its factorization.

18491279104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801696 (or 3801682 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 18491279104 in words is "eighteen billion, four hundred ninety-one million, two hundred seventy-nine thousand, one hundred four".