18349472 has 24 divisors (see below), whose sum is σ = 36741600. Its totient is φ = 9018304.

The previous prime is 18349439. The next prime is 18349481. The reversal of 18349472 is 27494381.

It is an alternating number because its digits alternate between odd and even.

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, 2972 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^18349472 is an apocalyptic number.

It is an amenable number.

18349472 is an abundant number, since it is smaller than the sum of its proper divisors (18392128).

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

18349472 is an equidigital number, since it uses as much as digits as its factorization.

18349472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788 (or 9780 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 18349472 is about 4283.6283685679. The cubic root of 18349472 is about 263.7593460447.

The spelling of 18349472 in words is "eighteen million, three hundred forty-nine thousand, four hundred seventy-two".