18149900 has 18 divisors (see below), whose sum is σ = 39385500. Its totient is φ = 7259920.

The previous prime is 18149891. The next prime is 18149909. The reversal of 18149900 is 994181.

It is an interprime number because it is at equal distance from previous prime (18149891) and next prime (18149909).

It is not an unprimeable number, because it can be changed into a prime (18149909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90650 + ... + 90849.

Almost surely, 2^18149900 is an apocalyptic number.

18149900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18149900 is an abundant number, since it is smaller than the sum of its proper divisors (21235600).

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

18149900 is a wasteful number, since it uses less digits than its factorization.

18149900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181513 (or 181506 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 18149900 is about 4260.2699444988. The cubic root of 18149900 is about 262.7996276290.

The spelling of 18149900 in words is "eighteen million, one hundred forty-nine thousand, nine hundred".