18404932 has 48 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 7149312.

The previous prime is 18404923. The next prime is 18404983. The reversal of 18404932 is 23940481.

It is a junction number, because it is equal to n+sod(n) for n = 18404894 and 18404903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21048 + ... + 21904.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^18404932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18404932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20180160).

18404932 is an abundant number, since it is smaller than the sum of its proper divisors (21955388).

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

18404932 is a wasteful number, since it uses less digits than its factorization.

18404932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18404932 is about 4290.0969686011. The cubic root of 18404932 is about 264.0248101874.

The spelling of 18404932 in words is "eighteen million, four hundred four thousand, nine hundred thirty-two".