18929808922 has 4 divisors (see below), whose sum is σ = 28394713386. Its totient is φ = 9464904460.

The previous prime is 18929808881. The next prime is 18929808949. The reversal of 18929808922 is 22980892981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13757178681 + 5172630241 = 117291^2 + 71921^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4732452229 + ... + 4732452232.

Almost surely, 2^18929808922 is an apocalyptic number.

18929808922 is a deficient number, since it is larger than the sum of its proper divisors (9464904464).

18929808922 is an equidigital number, since it uses as much as digits as its factorization.

18929808922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9464904463.

The product of its (nonzero) digits is 2985984, while the sum is 58.

The spelling of 18929808922 in words is "eighteen billion, nine hundred twenty-nine million, eight hundred eight thousand, nine hundred twenty-two".