18193466772 has 72 divisors (see below), whose sum is σ = 50734680360. Its totient is φ = 5461447680.

The previous prime is 18193466749. The next prime is 18193466773. The reversal of 18193466772 is 27766439181.

It can be written as a sum of positive squares in 4 ways, for example, as 353590416 + 17839876356 = 18804^2 + 133566^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18193466773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454897 + ... + 493272.

Almost surely, 2^18193466772 is an apocalyptic number.

18193466772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18193466772 is an abundant number, since it is smaller than the sum of its proper divisors (32541213588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18193466772 is a wasteful number, since it uses less digits than its factorization.

18193466772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948233 (or 948228 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 18193466772 in words is "eighteen billion, one hundred ninety-three million, four hundred sixty-six thousand, seven hundred seventy-two".