18837745918 has 8 divisors (see below), whose sum is σ = 28257216120. Its totient is φ = 9418673880.

The previous prime is 18837745903. The next prime is 18837745921. The reversal of 18837745918 is 81954773881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18837745918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94008 + ... + 215668.

It is an arithmetic number, because the mean of its divisors is an integer number (3532152015).

Almost surely, 2^18837745918 is an apocalyptic number.

18837745918 is a deficient number, since it is larger than the sum of its proper divisors (9419470202).

18837745918 is a wasteful number, since it uses less digits than its factorization.

18837745918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199082.

The product of its digits is 13547520, while the sum is 61.

The spelling of 18837745918 in words is "eighteen billion, eight hundred thirty-seven million, seven hundred forty-five thousand, nine hundred eighteen".