18722976 has 48 divisors (see below), whose sum is σ = 49660128. Its totient is φ = 6176000.

The previous prime is 18722947. The next prime is 18722981. The reversal of 18722976 is 67922781.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8731 + ... + 10661.

It is an arithmetic number, because the mean of its divisors is an integer number (1034586).

Almost surely, 2^18722976 is an apocalyptic number.

18722976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18722976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24830064).

18722976 is an abundant number, since it is smaller than the sum of its proper divisors (30937152).

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

18722976 is a wasteful number, since it uses less digits than its factorization.

18722976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2037 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 18722976 is about 4327.0054310112. The cubic root of 18722976 is about 265.5369485500.

The spelling of 18722976 in words is "eighteen million, seven hundred twenty-two thousand, nine hundred seventy-six".