18805145396 has 6 divisors (see below), whose sum is σ = 32909004450. Its totient is φ = 9402572696.

The previous prime is 18805145389. The next prime is 18805145399. The reversal of 18805145396 is 69354150881.

It can be written as a sum of positive squares in only one way, i.e., 11101572496 + 7703572900 = 105364^2 + 87770^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805145399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2350643171 + ... + 2350643178.

It is an arithmetic number, because the mean of its divisors is an integer number (5484834075).

Almost surely, 2^18805145396 is an apocalyptic number.

It is an amenable number.

18805145396 is a deficient number, since it is larger than the sum of its proper divisors (14103859054).

18805145396 is a wasteful number, since it uses less digits than its factorization.

18805145396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701286353 (or 4701286351 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 18805145396 in words is "eighteen billion, eight hundred five million, one hundred forty-five thousand, three hundred ninety-six".