18313631948 has 24 divisors (see below), whose sum is σ = 32362028160. Its totient is φ = 9067438080.

The previous prime is 18313631923. The next prime is 18313631953. The reversal of 18313631948 is 84913631381.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783308 + ... + 806348.

It is an arithmetic number, because the mean of its divisors is an integer number (1348417840).

Almost surely, 2^18313631948 is an apocalyptic number.

It is an amenable number.

18313631948 is a deficient number, since it is larger than the sum of its proper divisors (14048396212).

18313631948 is a wasteful number, since it uses less digits than its factorization.

18313631948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24977 (or 24975 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The spelling of 18313631948 in words is "eighteen billion, three hundred thirteen million, six hundred thirty-one thousand, nine hundred forty-eight".