18728241522 has 16 divisors (see below), whose sum is σ = 39659805792. Its totient is φ = 5875526720.

The previous prime is 18728241391. The next prime is 18728241551. The reversal of 18728241522 is 22514282781.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91805004 + ... + 91805207.

It is an arithmetic number, because the mean of its divisors is an integer number (2478737862).

Almost surely, 2^18728241522 is an apocalyptic number.

18728241522 is an abundant number, since it is smaller than the sum of its proper divisors (20931564270).

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

18728241522 is a wasteful number, since it uses less digits than its factorization.

18728241522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183610233.

The product of its digits is 143360, while the sum is 42.

The spelling of 18728241522 in words is "eighteen billion, seven hundred twenty-eight million, two hundred forty-one thousand, five hundred twenty-two".