18190956 has 36 divisors (see below), whose sum is σ = 49377048. Its totient is φ = 5197248.

The previous prime is 18190919. The next prime is 18190967. The reversal of 18190956 is 65909181.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 14881 + ... + 16056.

Almost surely, 2^18190956 is an apocalyptic number.

It is an amenable number.

18190956 is an abundant number, since it is smaller than the sum of its proper divisors (31186092).

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

18190956 is a wasteful number, since it uses less digits than its factorization.

18190956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958 (or 30949 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 18190956 is about 4265.0856966771. The cubic root of 18190956 is about 262.9976337935.

The spelling of 18190956 in words is "eighteen million, one hundred ninety thousand, nine hundred fifty-six".