18982992 has 80 divisors (see below), whose sum is σ = 57238400. Its totient is φ = 5419008.

The previous prime is 18982991. The next prime is 18983009. The reversal of 18982992 is 29928981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18982991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15888 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (715480).

Almost surely, 2^18982992 is an apocalyptic number.

18982992 is a gapful number since it is divisible by the number (12) 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 18982992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28619200).

18982992 is an abundant number, since it is smaller than the sum of its proper divisors (38255408).

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

18982992 is a wasteful number, since it uses less digits than its factorization.

18982992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1165 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 18982992 is about 4356.9475553419. The cubic root of 18982992 is about 266.7605197424.

The spelling of 18982992 in words is "eighteen million, nine hundred eighty-two thousand, nine hundred ninety-two".