18397630 has 8 divisors (see below), whose sum is σ = 33115752. Its totient is φ = 7359048.

The previous prime is 18397627. The next prime is 18397637. The reversal of 18397630 is 3679381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18397630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919872 + ... + 919891.

It is an arithmetic number, because the mean of its divisors is an integer number (4139469).

Almost surely, 2^18397630 is an apocalyptic number.

18397630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18397630 is a deficient number, since it is larger than the sum of its proper divisors (14718122).

18397630 is a wasteful number, since it uses less digits than its factorization.

18397630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839770.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 18397630 is about 4289.2458544597. The cubic root of 18397630 is about 263.9898890373.

The spelling of 18397630 in words is "eighteen million, three hundred ninety-seven thousand, six hundred thirty".