18616442 has 16 divisors (see below), whose sum is σ = 30170112. Its totient is φ = 8564400.

The previous prime is 18616441. The next prime is 18616469. The reversal of 18616442 is 24461681.

It is a junction number, because it is equal to n+sod(n) for n = 18616399 and 18616408.

It is not an unprimeable number, because it can be changed into a prime (18616441) 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, 8567 + ... + 10517.

It is an arithmetic number, because the mean of its divisors is an integer number (1885632).

Almost surely, 2^18616442 is an apocalyptic number.

18616442 is a deficient number, since it is larger than the sum of its proper divisors (11553670).

18616442 is a wasteful number, since it uses less digits than its factorization.

18616442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333.

The product of its digits is 9216, while the sum is 32.

The square root of 18616442 is about 4314.6775082270. The cubic root of 18616442 is about 265.0323539470.

The spelling of 18616442 in words is "eighteen million, six hundred sixteen thousand, four hundred forty-two".