18051492 has 24 divisors (see below), whose sum is σ = 42357952. Its totient is φ = 5983200.

The previous prime is 18051491. The next prime is 18051493. The reversal of 18051492 is 29415081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18051491) and next prime (18051493).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18051491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984 + ... + 6327.

Almost surely, 2^18051492 is an apocalyptic number.

18051492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18051492 is an abundant number, since it is smaller than the sum of its proper divisors (24306460).

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

18051492 is a wasteful number, since it uses less digits than its factorization.

18051492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8499 (or 8497 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18051492 is about 4248.7047438013. The cubic root of 18051492 is about 262.3238037548.

The spelling of 18051492 in words is "eighteen million, fifty-one thousand, four hundred ninety-two".