18589420 has 24 divisors (see below), whose sum is σ = 39211200. Its totient is φ = 7402752.

The previous prime is 18589409. The next prime is 18589423. The reversal of 18589420 is 2498581.

It is a self number, because there is not a number n which added to its sum of digits gives 18589420.

It is not an unprimeable number, because it can be changed into a prime (18589423) 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, 2836 + ... + 6724.

It is an arithmetic number, because the mean of its divisors is an integer number (1633800).

Almost surely, 2^18589420 is an apocalyptic number.

18589420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18589420 is an abundant number, since it is smaller than the sum of its proper divisors (20621780).

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

18589420 is a wasteful number, since it uses less digits than its factorization.

18589420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137 (or 4135 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18589420 is about 4311.5449667144. The cubic root of 18589420 is about 264.9040592534.

The spelling of 18589420 in words is "eighteen million, five hundred eighty-nine thousand, four hundred twenty".