18837920 has 48 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 7206144.

The previous prime is 18837899. The next prime is 18837941. The reversal of 18837920 is 2973881.

It is an interprime number because it is at equal distance from previous prime (18837899) and next prime (18837941).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121 + ... + 6239.

It is an arithmetic number, because the mean of its divisors is an integer number (967680).

Almost surely, 2^18837920 is an apocalyptic number.

18837920 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 18837920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23224320).

18837920 is an abundant number, since it is smaller than the sum of its proper divisors (27610720).

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

18837920 is a wasteful number, since it uses less digits than its factorization.

18837920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157 (or 5149 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 18837920 is about 4340.2672728762. The cubic root of 18837920 is about 266.0792346918.

The spelling of 18837920 in words is "eighteen million, eight hundred thirty-seven thousand, nine hundred twenty".