18442395 has 12 divisors (see below), whose sum is σ = 31966896. Its totient is φ = 9835920.

The previous prime is 18442393. The next prime is 18442409. The reversal of 18442395 is 59324481.

It is not a de Polignac number, because 18442395 - 2¹ = 18442393 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18442393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204871 + ... + 204960.

It is an arithmetic number, because the mean of its divisors is an integer number (2663908).

Almost surely, 2^18442395 is an apocalyptic number.

18442395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18442395 is a deficient number, since it is larger than the sum of its proper divisors (13524501).

18442395 is a wasteful number, since it uses less digits than its factorization.

18442395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409842 (or 409839 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18442395 is about 4294.4609673392. The cubic root of 18442395 is about 264.2038284697.

The spelling of 18442395 in words is "eighteen million, four hundred forty-two thousand, three hundred ninety-five".