18713257634 has 32 divisors (see below), whose sum is σ = 29745144000. Its totient is φ = 8814383424.

The previous prime is 18713257583. The next prime is 18713257657. The reversal of 18713257634 is 43675231781.

It is a happy number.

It is a super-2 number, since 2×18713257634² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2662577 + ... + 2669595.

It is an arithmetic number, because the mean of its divisors is an integer number (929535750).

Almost surely, 2^18713257634 is an apocalyptic number.

18713257634 is a deficient number, since it is larger than the sum of its proper divisors (11031886366).

18713257634 is a wasteful number, since it uses less digits than its factorization.

18713257634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8162.

The product of its digits is 846720, while the sum is 47.

The spelling of 18713257634 in words is "eighteen billion, seven hundred thirteen million, two hundred fifty-seven thousand, six hundred thirty-four".