18913894248 has 64 divisors (see below), whose sum is σ = 47664984960. Its totient is φ = 6254067456.

The previous prime is 18913894229. The next prime is 18913894253. The reversal of 18913894248 is 84249831981.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2456661 + ... + 2464347.

It is an arithmetic number, because the mean of its divisors is an integer number (744765390).

Almost surely, 2^18913894248 is an apocalyptic number.

It is an amenable number.

18913894248 is an abundant number, since it is smaller than the sum of its proper divisors (28751090712).

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

18913894248 is a wasteful number, since it uses less digits than its factorization.

18913894248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8506 (or 8502 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 57.

The spelling of 18913894248 in words is "eighteen billion, nine hundred thirteen million, eight hundred ninety-four thousand, two hundred forty-eight".