18642942 has 24 divisors (see below), whose sum is σ = 41057640. Its totient is φ = 6112080.

The previous prime is 18642941. The next prime is 18642961. The reversal of 18642942 is 24924681.

18642942 is a `hidden beast` number, since 1 + 8 + 642 + 9 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18642897 and 18642906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7392 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (1710735).

Almost surely, 2^18642942 is an apocalyptic number.

18642942 is an abundant number, since it is smaller than the sum of its proper divisors (22414698).

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

18642942 is a wasteful number, since it uses less digits than its factorization.

18642942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048 (or 17045 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18642942 is about 4317.7473293374. The cubic root of 18642942 is about 265.1580497789.

The spelling of 18642942 in words is "eighteen million, six hundred forty-two thousand, nine hundred forty-two".