18764413815 has 16 divisors (see below), whose sum is σ = 34312071168. Its totient is φ = 8578017696.

The previous prime is 18764413807. The next prime is 18764413819. The reversal of 18764413815 is 51831446781.

It is not a de Polignac number, because 18764413815 - 2³ = 18764413807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18764413819) 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, 89354247 + ... + 89354456.

It is an arithmetic number, because the mean of its divisors is an integer number (2144504448).

Almost surely, 2^18764413815 is an apocalyptic number.

18764413815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18764413815 is a deficient number, since it is larger than the sum of its proper divisors (15547657353).

18764413815 is a wasteful number, since it uses less digits than its factorization.

18764413815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178708718.

The product of its digits is 645120, while the sum is 48.

The spelling of 18764413815 in words is "eighteen billion, seven hundred sixty-four million, four hundred thirteen thousand, eight hundred fifteen".