18249492 has 48 divisors (see below), whose sum is σ = 43872192. Its totient is φ = 5902080.

The previous prime is 18249487. The next prime is 18249499. The reversal of 18249492 is 29494281.

It is a self number, because there is not a number n which added to its sum of digits gives 18249492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18249499) 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, 78208 + ... + 78440.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^18249492 is an apocalyptic number.

18249492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18249492 is an abundant number, since it is smaller than the sum of its proper divisors (25622700).

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

18249492 is a wasteful number, since it uses less digits than its factorization.

18249492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 406 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 18249492 is about 4271.9424153422. The cubic root of 18249492 is about 263.2794285148.

The spelling of 18249492 in words is "eighteen million, two hundred forty-nine thousand, four hundred ninety-two".