18894162913 has 4 divisors (see below), whose sum is σ = 19888592560. Its totient is φ = 17899733268.

The previous prime is 18894162893. The next prime is 18894162953. The reversal of 18894162913 is 31926149881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31926149881 = 1249 ⋅25561369.

It is a cyclic number.

It is not a de Polignac number, because 18894162913 - 2¹⁷ = 18894031841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18894162953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497214795 + ... + 497214832.

It is an arithmetic number, because the mean of its divisors is an integer number (4972148140).

Almost surely, 2^18894162913 is an apocalyptic number.

It is an amenable number.

18894162913 is a deficient number, since it is larger than the sum of its proper divisors (994429647).

18894162913 is an equidigital number, since it uses as much as digits as its factorization.

18894162913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994429646.

The product of its digits is 746496, while the sum is 52.

The spelling of 18894162913 in words is "eighteen billion, eight hundred ninety-four million, one hundred sixty-two thousand, nine hundred thirteen".