18085731436 has 6 divisors (see below), whose sum is σ = 31650030020. Its totient is φ = 9042865716.

The previous prime is 18085731407. The next prime is 18085731463. The reversal of 18085731436 is 63413758081.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260716426 + ... + 2260716433.

Almost surely, 2^18085731436 is an apocalyptic number.

It is an amenable number.

18085731436 is a deficient number, since it is larger than the sum of its proper divisors (13564298584).

18085731436 is a wasteful number, since it uses less digits than its factorization.

18085731436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521432863 (or 4521432861 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 18085731436 in words is "eighteen billion, eighty-five million, seven hundred thirty-one thousand, four hundred thirty-six".