18894913715 has 4 divisors (see below), whose sum is σ = 22673896464. Its totient is φ = 15115930968.

The previous prime is 18894913699. The next prime is 18894913777. The reversal of 18894913715 is 51731949881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18894913715 - 2⁴ = 18894913699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1889491367 + ... + 1889491376.

It is an arithmetic number, because the mean of its divisors is an integer number (5668474116).

Almost surely, 2^18894913715 is an apocalyptic number.

18894913715 is a deficient number, since it is larger than the sum of its proper divisors (3778982749).

18894913715 is an equidigital number, since it uses as much as digits as its factorization.

18894913715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778982748.

The product of its digits is 2177280, while the sum is 56.

The spelling of 18894913715 in words is "eighteen billion, eight hundred ninety-four million, nine hundred thirteen thousand, seven hundred fifteen".