18086015786 has 4 divisors (see below), whose sum is σ = 27129023682. Its totient is φ = 9043007892.

The previous prime is 18086015767. The next prime is 18086015791. The reversal of 18086015786 is 68751068081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15545351761 + 2540664025 = 124681^2 + 50405^2 .

It is a super-2 number, since 2×18086015786² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4521503945 + ... + 4521503948.

Almost surely, 2^18086015786 is an apocalyptic number.

18086015786 is a deficient number, since it is larger than the sum of its proper divisors (9043007896).

18086015786 is an equidigital number, since it uses as much as digits as its factorization.

18086015786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043007895.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 18086015786 in words is "eighteen billion, eighty-six million, fifteen thousand, seven hundred eighty-six".