18900540 has 72 divisors (see below), whose sum is σ = 59470320. Its totient is φ = 5038848.

The previous prime is 18900529. The next prime is 18900569. The reversal of 18900540 is 4500981.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2916 + ... + 6804.

Almost surely, 2^18900540 is an apocalyptic number.

18900540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18900540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29735160).

18900540 is an abundant number, since it is smaller than the sum of its proper divisors (40569780).

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

18900540 is a wasteful number, since it uses less digits than its factorization.

18900540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18900540 is about 4347.4751293136. The cubic root of 18900540 is about 266.3737373672.

The spelling of 18900540 in words is "eighteen million, nine hundred thousand, five hundred forty".