18157072244 has 12 divisors (see below), whose sum is σ = 31775924544. Its totient is φ = 9078236664.

The previous prime is 18157072243. The next prime is 18157072247. The reversal of 18157072244 is 44227075181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18157072243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115139 + ... + 222645.

It is an arithmetic number, because the mean of its divisors is an integer number (2647993712).

Almost surely, 2^18157072244 is an apocalyptic number.

It is an amenable number.

18157072244 is a deficient number, since it is larger than the sum of its proper divisors (13618852300).

18157072244 is a wasteful number, since it uses less digits than its factorization.

18157072244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149734 (or 149732 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 18157072244 in words is "eighteen billion, one hundred fifty-seven million, seventy-two thousand, two hundred forty-four".