18772387308 has 30 divisors (see below), whose sum is σ = 49074729396. Its totient is φ = 6257462328.

The previous prime is 18772387297. The next prime is 18772387327. The reversal of 18772387308 is 80378327781.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28969410 + ... + 28970057.

Almost surely, 2^18772387308 is an apocalyptic number.

18772387308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18772387308 is an abundant number, since it is smaller than the sum of its proper divisors (30302342088).

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

18772387308 is a wasteful number, since it uses less digits than its factorization.

18772387308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57939483 (or 57939472 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 18772387308 in words is "eighteen billion, seven hundred seventy-two million, three hundred eighty-seven thousand, three hundred eight".