18913080 has 48 divisors (see below), whose sum is σ = 56882520. Its totient is φ = 5030784.

The previous prime is 18913079. The next prime is 18913109. The reversal of 18913080 is 8031981.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47442 + ... + 47838.

Almost surely, 2^18913080 is an apocalyptic number.

18913080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18913080 is an abundant number, since it is smaller than the sum of its proper divisors (37969440).

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

18913080 is an equidigital number, since it uses as much as digits as its factorization.

18913080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18913080 is about 4348.9171065910. The cubic root of 18913080 is about 266.4326349472.

Multiplying 18913080 by its sum of digits (30), we get a square (567392400 = 23820²).

18913080 divided by its sum of digits (30) gives a square (630436 = 794²).

The spelling of 18913080 in words is "eighteen million, nine hundred thirteen thousand, eighty".