18780672 has 40 divisors (see below), whose sum is σ = 50036976. Its totient is φ = 6259712.

The previous prime is 18780667. The next prime is 18780731. The reversal of 18780672 is 27608781.

It is a self number, because there is not a number n which added to its sum of digits gives 18780672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4578 + ... + 7649.

Almost surely, 2^18780672 is an apocalyptic number.

18780672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18780672 is an abundant number, since it is smaller than the sum of its proper divisors (31256304).

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

18780672 is an equidigital number, since it uses as much as digits as its factorization.

18780672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12248 (or 12232 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 18780672 is about 4333.6672691844. The cubic root of 18780672 is about 265.8094249934.

The spelling of 18780672 in words is "eighteen million, seven hundred eighty thousand, six hundred seventy-two".