18722042452 has 12 divisors (see below), whose sum is σ = 33381755316. Its totient is φ = 9184398080.

The previous prime is 18722042447. The next prime is 18722042473. The reversal of 18722042452 is 25424022781.

It can be written as a sum of positive squares in 2 ways, for example, as 9460674756 + 9261367696 = 97266^2 + 96236^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44155549 + ... + 44155972.

It is an arithmetic number, because the mean of its divisors is an integer number (2781812943).

Almost surely, 2^18722042452 is an apocalyptic number.

It is an amenable number.

18722042452 is a deficient number, since it is larger than the sum of its proper divisors (14659712864).

18722042452 is a wasteful number, since it uses less digits than its factorization.

18722042452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88311578 (or 88311576 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 37.

The spelling of 18722042452 in words is "eighteen billion, seven hundred twenty-two million, forty-two thousand, four hundred fifty-two".