18397941 has 4 divisors (see below), whose sum is σ = 24530592. Its totient is φ = 12265292.

The previous prime is 18397933. The next prime is 18397957. The reversal of 18397941 is 14979381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18397941 - 2³ = 18397933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18397893 and 18397902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397921) 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, 3066321 + ... + 3066326.

It is an arithmetic number, because the mean of its divisors is an integer number (6132648).

Almost surely, 2^18397941 is an apocalyptic number.

It is an amenable number.

18397941 is a deficient number, since it is larger than the sum of its proper divisors (6132651).

18397941 is an equidigital number, since it uses as much as digits as its factorization.

18397941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132650.

The product of its digits is 54432, while the sum is 42.

The square root of 18397941 is about 4289.2821077658. The cubic root of 18397941 is about 263.9913765549.

The spelling of 18397941 in words is "eighteen million, three hundred ninety-seven thousand, nine hundred forty-one".