18392940 has 48 divisors (see below), whose sum is σ = 57224160. Its totient is φ = 4904640.

The previous prime is 18392923. The next prime is 18392947. The reversal of 18392940 is 4929381.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18392895 and 18392904.

It is not an unprimeable number, because it can be changed into a prime (18392947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16491 + ... + 17570.

It is an arithmetic number, because the mean of its divisors is an integer number (1192170).

Almost surely, 2^18392940 is an apocalyptic number.

18392940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18392940 is an abundant number, since it is smaller than the sum of its proper divisors (38831220).

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

18392940 is a wasteful number, since it uses less digits than its factorization.

18392940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34079 (or 34071 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 18392940 is about 4288.6991034578. The cubic root of 18392940 is about 263.9674546657.

The spelling of 18392940 in words is "eighteen million, three hundred ninety-two thousand, nine hundred forty".