18797976 has 48 divisors (see below), whose sum is σ = 51325560. Its totient is φ = 6215040.

The previous prime is 18797963. The next prime is 18797981. The reversal of 18797976 is 67979781.

It is a congruent number.

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, 8436 + ... + 10428.

Almost surely, 2^18797976 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 18797976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25662780).

18797976 is an abundant number, since it is smaller than the sum of its proper divisors (32527584).

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

18797976 is a wasteful number, since it uses less digits than its factorization.

18797976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2129 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 18797976 is about 4335.6632710578. The cubic root of 18797976 is about 265.8910364567.

The spelling of 18797976 in words is "eighteen million, seven hundred ninety-seven thousand, nine hundred seventy-six".