18142956 has 36 divisors (see below), whose sum is σ = 49390432. Its totient is φ = 5582304.

The previous prime is 18142937. The next prime is 18142963. The reversal of 18142956 is 65924181.

18142956 is a `hidden beast` number, since 181 + 429 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18142956.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18916 + ... + 19851.

Almost surely, 2^18142956 is an apocalyptic number.

It is an amenable number.

18142956 is an abundant number, since it is smaller than the sum of its proper divisors (31247476).

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

18142956 is a wasteful number, since it uses less digits than its factorization.

18142956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38790 (or 38785 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18142956 is about 4259.4548947019. The cubic root of 18142956 is about 262.7661083738.

The spelling of 18142956 in words is "eighteen million, one hundred forty-two thousand, nine hundred fifty-six".