18878303785 has 16 divisors (see below), whose sum is σ = 24728778432. Its totient is φ = 13721140800.

The previous prime is 18878303693. The next prime is 18878303827. The reversal of 18878303785 is 58730387881.

It is not a de Polignac number, because 18878303785 - 2⁷ = 18878303657 is a prime.

It is a Duffinian 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, 16719 + ... + 195028.

It is an arithmetic number, because the mean of its divisors is an integer number (1545548652).

Almost surely, 2^18878303785 is an apocalyptic number.

It is an amenable number.

18878303785 is a deficient number, since it is larger than the sum of its proper divisors (5850474647).

18878303785 is a wasteful number, since it uses less digits than its factorization.

18878303785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213384.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 18878303785 in words is "eighteen billion, eight hundred seventy-eight million, three hundred three thousand, seven hundred eighty-five".