18790956 has 72 divisors (see below), whose sum is σ = 50450400. Its totient is φ = 5886720.

The previous prime is 18790939. The next prime is 18790979. The reversal of 18790956 is 65909781.

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 23 ways as a sum of consecutive naturals, for example, 42585 + ... + 43023.

It is an arithmetic number, because the mean of its divisors is an integer number (700700).

Almost surely, 2^18790956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18790956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25225200).

18790956 is an abundant number, since it is smaller than the sum of its proper divisors (31659444).

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

18790956 is a wasteful number, since it uses less digits than its factorization.

18790956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 18790956 is about 4334.8536307469. The cubic root of 18790956 is about 265.8579338242.

The spelling of 18790956 in words is "eighteen million, seven hundred ninety thousand, nine hundred fifty-six".