18232997 has 8 divisors (see below), whose sum is σ = 19094400. Its totient is φ = 17377360.

The previous prime is 18232979. The next prime is 18232999. The reversal of 18232997 is 79923281.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18232997 - 2²⁰ = 17184421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5879 + ... + 8427.

It is an arithmetic number, because the mean of its divisors is an integer number (2386800).

Almost surely, 2^18232997 is an apocalyptic number.

It is an amenable number.

18232997 is a deficient number, since it is larger than the sum of its proper divisors (861403).

18232997 is a wasteful number, since it uses less digits than its factorization.

18232997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its digits is 54432, while the sum is 41.

The square root of 18232997 is about 4270.0113582987. The cubic root of 18232997 is about 263.2000819544.

The spelling of 18232997 in words is "eighteen million, two hundred thirty-two thousand, nine hundred ninety-seven".