18915000322 has 4 divisors (see below), whose sum is σ = 28372500486. Its totient is φ = 9457500160.

The previous prime is 18915000301. The next prime is 18915000323. The reversal of 18915000322 is 22300051981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22300051981 = 79 ⋅282279139.

It can be written as a sum of positive squares in only one way, i.e., 16243247601 + 2671752721 = 127449^2 + 51689^2 .

It is not an unprimeable number, because it can be changed into a prime (18915000323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4728750079 + ... + 4728750082.

Almost surely, 2^18915000322 is an apocalyptic number.

18915000322 is a deficient number, since it is larger than the sum of its proper divisors (9457500164).

18915000322 is an equidigital number, since it uses as much as digits as its factorization.

18915000322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457500163.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 18915000322 in words is "eighteen billion, nine hundred fifteen million, three hundred twenty-two", and thus it is an aban number.