18273444412 has 12 divisors (see below), whose sum is σ = 32842812520. Its totient is φ = 8889783696.

The previous prime is 18273444407. The next prime is 18273444437. The reversal of 18273444412 is 21444437281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61734462 + ... + 61734757.

Almost surely, 2^18273444412 is an apocalyptic number.

It is an amenable number.

18273444412 is a deficient number, since it is larger than the sum of its proper divisors (14569368108).

18273444412 is a wasteful number, since it uses less digits than its factorization.

18273444412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123469260 (or 123469258 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The spelling of 18273444412 in words is "eighteen billion, two hundred seventy-three million, four hundred forty-four thousand, four hundred twelve".