18934020 has 96 divisors (see below), whose sum is σ = 67334400. Its totient is φ = 4326912.

The previous prime is 18934007. The next prime is 18934031. The reversal of 18934020 is 2043981.

It is a super-2 number, since 2×18934020² = 716994226720800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1276 + ... + 6284.

It is an arithmetic number, because the mean of its divisors is an integer number (701400).

Almost surely, 2^18934020 is an apocalyptic number.

18934020 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 18934020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33667200).

18934020 is an abundant number, since it is smaller than the sum of its proper divisors (48400380).

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

18934020 is a wasteful number, since it uses less digits than its factorization.

18934020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034 (or 5026 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18934020 is about 4351.3239364589. The cubic root of 18934020 is about 266.5309274452.

The spelling of 18934020 in words is "eighteen million, nine hundred thirty-four thousand, twenty".