18012786499 has 16 divisors (see below), whose sum is σ = 18731704320. Its totient is φ = 17302790880.

The previous prime is 18012786487. The next prime is 18012786503. The reversal of 18012786499 is 99468721081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18012786499 - 2⁷ = 18012786371 is a prime.

It is a super-3 number, since 3×18012786499³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18012786299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4413942 + ... + 4418020.

It is an arithmetic number, because the mean of its divisors is an integer number (1170731520).

Almost surely, 2^18012786499 is an apocalyptic number.

18012786499 is a deficient number, since it is larger than the sum of its proper divisors (718917821).

18012786499 is a wasteful number, since it uses less digits than its factorization.

18012786499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 18012786499 in words is "eighteen billion, twelve million, seven hundred eighty-six thousand, four hundred ninety-nine".