18630020 has 24 divisors (see below), whose sum is σ = 39709824. Its totient is φ = 7340256.

The previous prime is 18629999. The next prime is 18630037. The reversal of 18630020 is 2003681.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 18629974 and 18630001.

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, 5612 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (1654576).

Almost surely, 2^18630020 is an apocalyptic number.

18630020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18630020 is an abundant number, since it is smaller than the sum of its proper divisors (21079804).

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

18630020 is a wasteful number, since it uses less digits than its factorization.

18630020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13979 (or 13977 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18630020 is about 4316.2506878076. The cubic root of 18630020 is about 265.0967725358.

The spelling of 18630020 in words is "eighteen million, six hundred thirty thousand, twenty".