18196992 has 120 divisors (see below), whose sum is σ = 57451680. Its totient is φ = 5498880.

The previous prime is 18196963. The next prime is 18196993. The reversal of 18196992 is 29969181.

It is a super-2 number, since 2×18196992² = 662261035696128, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18196993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50509 + ... + 50867.

It is an arithmetic number, because the mean of its divisors is an integer number (478764).

Almost surely, 2^18196992 is an apocalyptic number.

18196992 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 18196992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28725840).

18196992 is an abundant number, since it is smaller than the sum of its proper divisors (39254688).

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

18196992 is a wasteful number, since it uses less digits than its factorization.

18196992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 375 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 18196992 is about 4265.7932439348. The cubic root of 18196992 is about 263.0267192755.

The spelling of 18196992 in words is "eighteen million, one hundred ninety-six thousand, nine hundred ninety-two".