20323222999 has 4 divisors (see below), whose sum is σ = 20795856136. Its totient is φ = 19850589864.

The previous prime is 20323222987. The next prime is 20323223033. The reversal of 20323222999 is 99922232302.

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

It is a cyclic number.

It is not a de Polignac number, because 20323222999 - 2¹⁷ = 20323091927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 472633093 = 20323222999 / (2 + 0 + 3 + 2 + 3 + 2 + 2 + 2 + 9 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323222919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236316504 + ... + 236316589.

It is an arithmetic number, because the mean of its divisors is an integer number (5198964034).

Almost surely, 2^20323222999 is an apocalyptic number.

20323222999 is a deficient number, since it is larger than the sum of its proper divisors (472633137).

20323222999 is an equidigital number, since it uses as much as digits as its factorization.

20323222999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472633136.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 20323222999 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-two thousand, nine hundred ninety-nine".