18431208954 has 48 divisors (see below), whose sum is σ = 43183041408. Its totient is φ = 5659307136.

The previous prime is 18431208947. The next prime is 18431208959. The reversal of 18431208954 is 45980213481.

18431208954 is a `hidden beast` number, since 1 + 8 + 431 + 208 + 9 + 5 + 4 = 666.

18431208954 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18431208959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 626392 + ... + 655155.

It is an arithmetic number, because the mean of its divisors is an integer number (899646696).

Almost surely, 2^18431208954 is an apocalyptic number.

18431208954 is an abundant number, since it is smaller than the sum of its proper divisors (24751832454).

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

18431208954 is a wasteful number, since it uses less digits than its factorization.

18431208954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281619 (or 1281616 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 18431208954 in words is "eighteen billion, four hundred thirty-one million, two hundred eight thousand, nine hundred fifty-four".