20422799999 has 4 divisors (see below), whose sum is σ = 23340342864. Its totient is φ = 17505257136.

The previous prime is 20422799983. The next prime is 20422800001. The reversal of 20422799999 is 99999722402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999722402 = 2 ⋅49999861201.

It is a cyclic number.

It is not a de Polignac number, because 20422799999 - 2⁴ = 20422799983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422799399) 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, 1458771422 + ... + 1458771435.

It is an arithmetic number, because the mean of its divisors is an integer number (5835085716).

Almost surely, 2^20422799999 is an apocalyptic number.

20422799999 is a deficient number, since it is larger than the sum of its proper divisors (2917542865).

20422799999 is an equidigital number, since it uses as much as digits as its factorization.

20422799999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917542864.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 20422799999 in words is "twenty billion, four hundred twenty-two million, seven hundred ninety-nine thousand, nine hundred ninety-nine".