18949392 has 120 divisors (see below), whose sum is σ = 66156480. Its totient is φ = 4919040.

The previous prime is 18949391. The next prime is 18949417. The reversal of 18949392 is 29394981.

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 (18949391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10234 + ... + 11942.

It is an arithmetic number, because the mean of its divisors is an integer number (551304).

Almost surely, 2^18949392 is an apocalyptic number.

18949392 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 18949392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33078240).

18949392 is an abundant number, since it is smaller than the sum of its proper divisors (47207088).

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

18949392 is a wasteful number, since it uses less digits than its factorization.

18949392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 1732 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 18949392 is about 4353.0899370447. The cubic root of 18949392 is about 266.6030375965.

The spelling of 18949392 in words is "eighteen million, nine hundred forty-nine thousand, three hundred ninety-two".