18442534 has 16 divisors (see below), whose sum is σ = 30606336. Its totient is φ = 8264200.

The previous prime is 18442531. The next prime is 18442537. The reversal of 18442534 is 43524481.

It is an interprime number because it is at equal distance from previous prime (18442531) and next prime (18442537).

It is a junction number, because it is equal to n+sod(n) for n = 18442496 and 18442505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4342 + ... + 7465.

It is an arithmetic number, because the mean of its divisors is an integer number (1912896).

Almost surely, 2^18442534 is an apocalyptic number.

18442534 is a deficient number, since it is larger than the sum of its proper divisors (12163802).

18442534 is a wasteful number, since it uses less digits than its factorization.

18442534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891.

The product of its digits is 15360, while the sum is 31.

The square root of 18442534 is about 4294.4771509463. The cubic root of 18442534 is about 264.2044922345.

The spelling of 18442534 in words is "eighteen million, four hundred forty-two thousand, five hundred thirty-four".