18768714515 has 8 divisors (see below), whose sum is σ = 22590503088. Its totient is φ = 14969607840.

The previous prime is 18768714509. The next prime is 18768714571. The reversal of 18768714515 is 51541786781.

It is a happy number.

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

It is not a de Polignac number, because 18768714515 - 2²⁸ = 18500279059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5668652 + ... + 5671961.

It is an arithmetic number, because the mean of its divisors is an integer number (2823812886).

Almost surely, 2^18768714515 is an apocalyptic number.

18768714515 is a deficient number, since it is larger than the sum of its proper divisors (3821788573).

18768714515 is a wasteful number, since it uses less digits than its factorization.

18768714515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340949.

The product of its digits is 1881600, while the sum is 53.

It can be divided in two parts, 187687 and 14515, that added together give a palindrome (202202).

The spelling of 18768714515 in words is "eighteen billion, seven hundred sixty-eight million, seven hundred fourteen thousand, five hundred fifteen".