18868868495 has 16 divisors (see below), whose sum is σ = 22984843392. Its totient is φ = 14868062880.

The previous prime is 18868868477. The next prime is 18868868507. The reversal of 18868868495 is 59486886881.

It is a Cunningham number, because it is equal to 137364²-1.

It is not a de Polignac number, because 18868868495 - 2¹⁰ = 18868867471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68684 + ... + 206046.

It is an arithmetic number, because the mean of its divisors is an integer number (1436552712).

Almost surely, 2^18868868495 is an apocalyptic number.

18868868495 is a deficient number, since it is larger than the sum of its proper divisors (4115974897).

18868868495 is a wasteful number, since it uses less digits than its factorization.

18868868495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137782.

The product of its digits is 212336640, while the sum is 71.

The spelling of 18868868495 in words is "eighteen billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, four hundred ninety-five".