18137020 has 48 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 6246720.

The previous prime is 18137017. The next prime is 18137033. The reversal of 18137020 is 2073181.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 18136982 and 18137000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2011 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (911400).

Almost surely, 2^18137020 is an apocalyptic number.

18137020 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 18137020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21873600).

18137020 is an abundant number, since it is smaller than the sum of its proper divisors (25610180).

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

18137020 is a wasteful number, since it uses less digits than its factorization.

18137020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4378 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18137020 is about 4258.7580349205. The cubic root of 18137020 is about 262.7374480357.

The spelling of 18137020 in words is "eighteen million, one hundred thirty-seven thousand, twenty".