18264273049 has 8 divisors (see below), whose sum is σ = 19930063680. Its totient is φ = 16599382800.

The previous prime is 18264273031. The next prime is 18264273061. The reversal of 18264273049 is 94037246281.

It is a happy number.

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

It is not a de Polignac number, because 18264273049 - 2⁷ = 18264272921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18264273019) 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, 182322 + ... + 264139.

It is an arithmetic number, because the mean of its divisors is an integer number (2491257960).

Almost surely, 2^18264273049 is an apocalyptic number.

It is an amenable number.

18264273049 is a deficient number, since it is larger than the sum of its proper divisors (1665790631).

18264273049 is a wasteful number, since it uses less digits than its factorization.

18264273049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450191.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 18264273049 in words is "eighteen billion, two hundred sixty-four million, two hundred seventy-three thousand, forty-nine".