18240455400 has 96 divisors (see below), whose sum is σ = 57094589760. Its totient is φ = 4816880640.

The previous prime is 18240455377. The next prime is 18240455413. The reversal of 18240455400 is 455404281.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85777 + ... + 209376.

It is an arithmetic number, because the mean of its divisors is an integer number (594735310).

Almost surely, 2^18240455400 is an apocalyptic number.

18240455400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18240455400 is an abundant number, since it is smaller than the sum of its proper divisors (38854134360).

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

18240455400 is a wasteful number, since it uses less digits than its factorization.

18240455400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295275 (or 295266 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

Adding to 18240455400 its reverse (455404281), we get a palindrome (18695859681).

The spelling of 18240455400 in words is "eighteen billion, two hundred forty million, four hundred fifty-five thousand, four hundred".