18914920 has 32 divisors (see below), whose sum is σ = 42981120. Its totient is φ = 7490880.

The previous prime is 18914893. The next prime is 18914923. The reversal of 18914920 is 2941981.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18914923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1825 + ... + 6415.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^18914920 is an apocalyptic number.

18914920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18914920 is an abundant number, since it is smaller than the sum of its proper divisors (24066200).

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

18914920 is a wasteful number, since it uses less digits than its factorization.

18914920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705 (or 4701 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 18914920 is about 4349.1286483616. The cubic root of 18914920 is about 266.4412748259.

The spelling of 18914920 in words is "eighteen million, nine hundred fourteen thousand, nine hundred twenty".