18955730 has 16 divisors (see below), whose sum is σ = 35916480. Its totient is φ = 7183152.

The previous prime is 18955721. The next prime is 18955751. The reversal of 18955730 is 3755981.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 49694 + ... + 50073.

It is an arithmetic number, because the mean of its divisors is an integer number (2244780).

Almost surely, 2^18955730 is an apocalyptic number.

18955730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18955730 is a deficient number, since it is larger than the sum of its proper divisors (16960750).

18955730 is a wasteful number, since it uses less digits than its factorization.

18955730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99793.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 18955730 is about 4353.8178648170. The cubic root of 18955730 is about 266.6327578412.

The spelling of 18955730 in words is "eighteen million, nine hundred fifty-five thousand, seven hundred thirty".