18422976 has 168 divisors, whose sum is σ = 58645552. Its totient is φ = 5068800.

The previous prime is 18422969. The next prime is 18422983. The reversal of 18422976 is 67922481.

It is an interprime number because it is at equal distance from previous prime (18422969) and next prime (18422983).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301986 + ... + 302046.

Almost surely, 2^18422976 is an apocalyptic number.

18422976 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 18422976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29322776).

18422976 is an abundant number, since it is smaller than the sum of its proper divisors (40222576).

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

18422976 is a wasteful number, since it uses less digits than its factorization.

18422976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 90 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 18422976 is about 4292.1994361865. The cubic root of 18422976 is about 264.1110643800. Note that the first 3 decimals are identical.

The spelling of 18422976 in words is "eighteen million, four hundred twenty-two thousand, nine hundred seventy-six".