18448242772 has 24 divisors (see below), whose sum is σ = 33265061984. Its totient is φ = 8945564832.

The previous prime is 18448242751. The next prime is 18448242773. The reversal of 18448242772 is 27724284481.

It is a super-2 number, since 2×18448242772² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448242773) 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, 157578 + ... + 248449.

Almost surely, 2^18448242772 is an apocalyptic number.

It is an amenable number.

18448242772 is a deficient number, since it is larger than the sum of its proper divisors (14816819212).

18448242772 is a wasteful number, since it uses less digits than its factorization.

18448242772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406375 (or 406373 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 49.

The spelling of 18448242772 in words is "eighteen billion, four hundred forty-eight million, two hundred forty-two thousand, seven hundred seventy-two".