18492364809 has 12 divisors (see below), whose sum is σ = 26712592452. Its totient is φ = 12327597600.

The previous prime is 18492364801. The next prime is 18492364817. The reversal of 18492364809 is 90846329481.

18492364809 is a `hidden beast` number, since 18 + 492 + 3 + 64 + 80 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (18492364801) and next prime (18492364817).

It can be written as a sum of positive squares in 2 ways, for example, as 2239939584 + 16252425225 = 47328^2 + 127485^2 .

It is not a de Polignac number, because 18492364809 - 2³ = 18492364801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18492364801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181999 + ... + 264779.

It is an arithmetic number, because the mean of its divisors is an integer number (2226049371).

Almost surely, 2^18492364809 is an apocalyptic number.

It is an amenable number.

18492364809 is a deficient number, since it is larger than the sum of its proper divisors (8220227643).

18492364809 is a wasteful number, since it uses less digits than its factorization.

18492364809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107608 (or 107605 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 18492364809 in words is "eighteen billion, four hundred ninety-two million, three hundred sixty-four thousand, eight hundred nine".