20220109979 has 4 divisors (see below), whose sum is σ = 20220628584. Its totient is φ = 20219591376.

The previous prime is 20220109969. The next prime is 20220109981. The reversal of 20220109979 is 97990102202.

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 20220109979 - 2¹² = 20220105883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220109919) 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, 195602 + ... + 280535.

It is an arithmetic number, because the mean of its divisors is an integer number (5055157146).

Almost surely, 2^20220109979 is an apocalyptic number.

20220109979 is a deficient number, since it is larger than the sum of its proper divisors (518605).

20220109979 is an equidigital number, since it uses as much as digits as its factorization.

20220109979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518604.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 20220109979 in words is "twenty billion, two hundred twenty million, one hundred nine thousand, nine hundred seventy-nine".