18077298772 has 24 divisors (see below), whose sum is σ = 36072801576. Its totient is φ = 7852581888.

The previous prime is 18077298761. The next prime is 18077298779. The reversal of 18077298772 is 27789277081.

It can be written as a sum of positive squares in 4 ways, for example, as 44568976 + 18032729796 = 6676^2 + 134286^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18077298779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10223833 + ... + 10225600.

It is an arithmetic number, because the mean of its divisors is an integer number (1503033399).

Almost surely, 2^18077298772 is an apocalyptic number.

It is an amenable number.

18077298772 is a deficient number, since it is larger than the sum of its proper divisors (17995502804).

18077298772 is a wasteful number, since it uses less digits than its factorization.

18077298772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20449467 (or 20449465 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 58.

The spelling of 18077298772 in words is "eighteen billion, seventy-seven million, two hundred ninety-eight thousand, seven hundred seventy-two".