18306422893 has 8 divisors (see below), whose sum is σ = 19984237056. Its totient is φ = 16630874400.

The previous prime is 18306422881. The next prime is 18306422921. The reversal of 18306422893 is 39822460381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18306422893 - 2²⁹ = 17769551981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18306422843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549496 + ... + 581857.

It is an arithmetic number, because the mean of its divisors is an integer number (2498029632).

Almost surely, 2^18306422893 is an apocalyptic number.

It is an amenable number.

18306422893 is a deficient number, since it is larger than the sum of its proper divisors (1677814163).

18306422893 is a wasteful number, since it uses less digits than its factorization.

18306422893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132835.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 18306422893 in words is "eighteen billion, three hundred six million, four hundred twenty-two thousand, eight hundred ninety-three".