18713257630 has 16 divisors (see below), whose sum is σ = 33739367040. Its totient is φ = 7472968992.

The previous prime is 18713257583. The next prime is 18713257657. The reversal of 18713257630 is 3675231781.

It is a super-2 number, since 2×18713257630² (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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1535385 + ... + 1547524.

It is an arithmetic number, because the mean of its divisors is an integer number (2108710440).

Almost surely, 2^18713257630 is an apocalyptic number.

18713257630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18713257630 is a deficient number, since it is larger than the sum of its proper divisors (15026109410).

18713257630 is a wasteful number, since it uses less digits than its factorization.

18713257630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083523.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 18713257630 in words is "eighteen billion, seven hundred thirteen million, two hundred fifty-seven thousand, six hundred thirty".