18540492 has 12 divisors (see below), whose sum is σ = 43261176. Its totient is φ = 6180160.

The previous prime is 18540491. The next prime is 18540493. The reversal of 18540492 is 29404581.

It is an interprime number because it is at equal distance from previous prime (18540491) and next prime (18540493).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18540491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772509 + ... + 772532.

It is an arithmetic number, because the mean of its divisors is an integer number (3605098).

Almost surely, 2^18540492 is an apocalyptic number.

18540492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18540492 is an abundant number, since it is smaller than the sum of its proper divisors (24720684).

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

18540492 is a wasteful number, since it uses less digits than its factorization.

18540492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545048 (or 1545046 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18540492 is about 4305.8671600503. The cubic root of 18540492 is about 264.6714428165.

The spelling of 18540492 in words is "eighteen million, five hundred forty thousand, four hundred ninety-two".