18693899134 has 32 divisors (see below), whose sum is σ = 29024884224. Its totient is φ = 9025030560.

The previous prime is 18693899131. The next prime is 18693899141. The reversal of 18693899134 is 43199839681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693899131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4837287 + ... + 4841149.

It is an arithmetic number, because the mean of its divisors is an integer number (907027632).

Almost surely, 2^18693899134 is an apocalyptic number.

18693899134 is a deficient number, since it is larger than the sum of its proper divisors (10330985090).

18693899134 is a wasteful number, since it uses less digits than its factorization.

18693899134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632.

The product of its digits is 10077696, while the sum is 61.

The spelling of 18693899134 in words is "eighteen billion, six hundred ninety-three million, eight hundred ninety-nine thousand, one hundred thirty-four".