18738030 has 16 divisors (see below), whose sum is σ = 44971344. Its totient is φ = 4996800.

The previous prime is 18738023. The next prime is 18738053. The reversal of 18738030 is 3083781.

It is a super-2 number, since 2×18738030² = 702227536561800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 624601 = 18738030 / (1 + 8 + 7 + 3 + 8 + 0 + 3 + 0).

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, 312271 + ... + 312330.

It is an arithmetic number, because the mean of its divisors is an integer number (2810709).

Almost surely, 2^18738030 is an apocalyptic number.

18738030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18738030 is an abundant number, since it is smaller than the sum of its proper divisors (26233314).

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

18738030 is a wasteful number, since it uses less digits than its factorization.

18738030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624611.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18738030 is about 4328.7446217119. The cubic root of 18738030 is about 265.6080968252.

The spelling of 18738030 in words is "eighteen million, seven hundred thirty-eight thousand, thirty".