18012786986 has 8 divisors (see below), whose sum is σ = 27028515780. Its totient is φ = 9003281728.

The previous prime is 18012786971. The next prime is 18012787033. The reversal of 18012786986 is 68968721081.

It can be written as a sum of positive squares in 2 ways, for example, as 17687670025 + 325116961 = 132995^2 + 18031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×18012786986³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548641 + ... + 1560228.

Almost surely, 2^18012786986 is an apocalyptic number.

18012786986 is a deficient number, since it is larger than the sum of its proper divisors (9015728794).

18012786986 is a wasteful number, since it uses less digits than its factorization.

18012786986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111768.

The product of its (nonzero) digits is 2322432, while the sum is 56.

The spelling of 18012786986 in words is "eighteen billion, twelve million, seven hundred eighty-six thousand, nine hundred eighty-six".