18442136 has 32 divisors (see below), whose sum is σ = 36603360. Its totient is φ = 8692992.

The previous prime is 18442129. The next prime is 18442139. The reversal of 18442136 is 63124481.

It is a super-2 number, since 2×18442136² = 680224760484992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18442099 and 18442108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442139) 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, 12746 + ... + 14118.

It is an arithmetic number, because the mean of its divisors is an integer number (1143855).

Almost surely, 2^18442136 is an apocalyptic number.

It is an amenable number.

18442136 is a deficient number, since it is larger than the sum of its proper divisors (18161224).

18442136 is a wasteful number, since it uses less digits than its factorization.

18442136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1471 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 18442136 is about 4294.4308121100. The cubic root of 18442136 is about 264.2025916615.

The spelling of 18442136 in words is "eighteen million, four hundred forty-two thousand, one hundred thirty-six".