18157819702 has 12 divisors (see below), whose sum is σ = 29713830156. Its totient is φ = 8253267120.

The previous prime is 18157819651. The next prime is 18157819723. The reversal of 18157819702 is 20791875181.

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 5 ways as a sum of consecutive naturals, for example, 617674 + ... + 646402.

It is an arithmetic number, because the mean of its divisors is an integer number (2476152513).

Almost surely, 2^18157819702 is an apocalyptic number.

18157819702 is a deficient number, since it is larger than the sum of its proper divisors (11556010454).

18157819702 is an frugal number, since it uses more digits than its factorization.

18157819702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57471 (or 28742 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 18157819702 in words is "eighteen billion, one hundred fifty-seven million, eight hundred nineteen thousand, seven hundred two".