18690620 has 24 divisors (see below), whose sum is σ = 42270144. Its totient is φ = 6901056.

The previous prime is 18690611. The next prime is 18690641. The reversal of 18690620 is 2609681.

It is a congruent number.

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, 35684 + ... + 36203.

It is an arithmetic number, because the mean of its divisors is an integer number (1761256).

Almost surely, 2^18690620 is an apocalyptic number.

18690620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18690620 is an abundant number, since it is smaller than the sum of its proper divisors (23579524).

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

18690620 is a wasteful number, since it uses less digits than its factorization.

18690620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71909 (or 71907 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18690620 is about 4323.2649699041. The cubic root of 18690620 is about 265.3838983172.

The spelling of 18690620 in words is "eighteen million, six hundred ninety thousand, six hundred twenty".