18611442 has 24 divisors (see below), whose sum is σ = 40435200. Its totient is φ = 6186840.

The previous prime is 18611429. The next prime is 18611449. The reversal of 18611442 is 24411681.

It is a happy number.

18611442 is a `hidden beast` number, since 1 + 8 + 611 + 4 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (18611449) 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, 6559 + ... + 8957.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^18611442 is an apocalyptic number.

18611442 is an abundant number, since it is smaller than the sum of its proper divisors (21823758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18611442 is a wasteful number, since it uses less digits than its factorization.

18611442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838 (or 2835 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 18611442 is about 4314.0980517369. The cubic root of 18611442 is about 265.0086243782.

It can be divided in two parts, 186 and 11442, that multiplied together give a palindrome (2128212).

The spelling of 18611442 in words is "eighteen million, six hundred eleven thousand, four hundred forty-two".