18240202452 has 24 divisors (see below), whose sum is σ = 42566483232. Its totient is φ = 6079208800.

The previous prime is 18240202447. The next prime is 18240202459. The reversal of 18240202452 is 25420204281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240202459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15699 + ... + 191642.

It is an arithmetic number, because the mean of its divisors is an integer number (1773603468).

Almost surely, 2^18240202452 is an apocalyptic number.

18240202452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18240202452 is an abundant number, since it is smaller than the sum of its proper divisors (24326280780).

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

18240202452 is a wasteful number, since it uses less digits than its factorization.

18240202452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214679 (or 214677 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The spelling of 18240202452 in words is "eighteen billion, two hundred forty million, two hundred two thousand, four hundred fifty-two".