18932459772 has 24 divisors (see below), whose sum is σ = 44780888656. Its totient is φ = 6224370048.

The previous prime is 18932459753. The next prime is 18932459803. The reversal of 18932459772 is 27795423981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10805323 + ... + 10807074.

Almost surely, 2^18932459772 is an apocalyptic number.

18932459772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18932459772 is an abundant number, since it is smaller than the sum of its proper divisors (25848428884).

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

18932459772 is a wasteful number, since it uses less digits than its factorization.

18932459772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21612477 (or 21612475 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 57.

The spelling of 18932459772 in words is "eighteen billion, nine hundred thirty-two million, four hundred fifty-nine thousand, seven hundred seventy-two".