18545634936 has 80 divisors (see below), whose sum is σ = 51969214440. Its totient is φ = 6178991040.

The previous prime is 18545634929. The next prime is 18545634953. The reversal of 18545634936 is 63943654581.

18545634936 is a `hidden beast` number, since 1 + 8 + 5 + 4 + 563 + 49 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 1729351 + ... + 1740041.

Almost surely, 2^18545634936 is an apocalyptic number.

It is an amenable number.

18545634936 is an abundant number, since it is smaller than the sum of its proper divisors (33423579504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18545634936 is a wasteful number, since it uses less digits than its factorization.

18545634936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13386 (or 13373 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 18545634936 in words is "eighteen billion, five hundred forty-five million, six hundred thirty-four thousand, nine hundred thirty-six".