18181818364 has 24 divisors (see below), whose sum is σ = 31946555648. Its totient is φ = 9054264240.

The previous prime is 18181818301. The next prime is 18181818383. The reversal of 18181818364 is 46381818181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4420669 + ... + 4424779.

Almost surely, 2^18181818364 is an apocalyptic number.

It is an amenable number.

18181818364 is a deficient number, since it is larger than the sum of its proper divisors (13764737284).

18181818364 is a wasteful number, since it uses less digits than its factorization.

18181818364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8305 (or 8303 counting only the distinct ones).

The product of its digits is 294912, while the sum is 49.

The spelling of 18181818364 in words is "eighteen billion, one hundred eighty-one million, eight hundred eighteen thousand, three hundred sixty-four".