18456459940 has 48 divisors (see below), whose sum is σ = 41013423360. Its totient is φ = 6962130560.

The previous prime is 18456459911. The next prime is 18456459941. The reversal of 18456459940 is 4995465481.

It is not an unprimeable number, because it can be changed into a prime (18456459941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249895 + ... + 315214.

It is an arithmetic number, because the mean of its divisors is an integer number (854446320).

Almost surely, 2^18456459940 is an apocalyptic number.

18456459940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18456459940 is an abundant number, since it is smaller than the sum of its proper divisors (22556963420).

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

18456459940 is a wasteful number, since it uses less digits than its factorization.

18456459940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565212 (or 565210 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 18456459940 in words is "eighteen billion, four hundred fifty-six million, four hundred fifty-nine thousand, nine hundred forty".