18395397 has 8 divisors (see below), whose sum is σ = 27252480. Its totient is φ = 12263580.

The previous prime is 18395393. The next prime is 18395407. The reversal of 18395397 is 79359381.

It is a happy number.

It is not a de Polignac number, because 18395397 - 2² = 18395393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18395393) 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, 340629 + ... + 340682.

It is an arithmetic number, because the mean of its divisors is an integer number (3406560).

Almost surely, 2^18395397 is an apocalyptic number.

It is an amenable number.

18395397 is a deficient number, since it is larger than the sum of its proper divisors (8857083).

18395397 is an equidigital number, since it uses as much as digits as its factorization.

18395397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681320 (or 681314 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 18395397 is about 4288.9855443916. The cubic root of 18395397 is about 263.9792080733.

The spelling of 18395397 in words is "eighteen million, three hundred ninety-five thousand, three hundred ninety-seven".