20996224159 has 4 divisors (see below), whose sum is σ = 21232136880. Its totient is φ = 20760311440.

The previous prime is 20996224127. The next prime is 20996224163. The reversal of 20996224159 is 95142269902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95142269902 = 2 ⋅47571134951.

It is a cyclic number.

It is not a de Polignac number, because 20996224159 - 2⁵ = 20996224127 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20996224559) 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, 117956227 + ... + 117956404.

It is an arithmetic number, because the mean of its divisors is an integer number (5308034220).

Almost surely, 2^20996224159 is an apocalyptic number.

20996224159 is a deficient number, since it is larger than the sum of its proper divisors (235912721).

20996224159 is an equidigital number, since it uses as much as digits as its factorization.

20996224159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235912720.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 20996224159 in words is "twenty billion, nine hundred ninety-six million, two hundred twenty-four thousand, one hundred fifty-nine".