18040452 has 12 divisors (see below), whose sum is σ = 42094416. Its totient is φ = 6013480.

The previous prime is 18040447. The next prime is 18040457. The reversal of 18040452 is 25404081.

It is an interprime number because it is at equal distance from previous prime (18040447) and next prime (18040457).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18040457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751674 + ... + 751697.

It is an arithmetic number, because the mean of its divisors is an integer number (3507868).

Almost surely, 2^18040452 is an apocalyptic number.

18040452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18040452 is an abundant number, since it is smaller than the sum of its proper divisors (24053964).

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

18040452 is a wasteful number, since it uses less digits than its factorization.

18040452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503378 (or 1503376 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 18040452 is about 4247.4053256076. The cubic root of 18040452 is about 262.2703151865.

The spelling of 18040452 in words is "eighteen million, forty thousand, four hundred fifty-two".