220010209979 has 4 divisors (see below), whose sum is σ = 251440239984. Its totient is φ = 188580179976.

The previous prime is 220010209897. The next prime is 220010209999. The reversal of 220010209979 is 979902010022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220010209979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220010209999) 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, 15715014992 + ... + 15715015005.

It is an arithmetic number, because the mean of its divisors is an integer number (62860059996).

Almost surely, 2^220010209979 is an apocalyptic number.

220010209979 is a deficient number, since it is larger than the sum of its proper divisors (31430030005).

220010209979 is an equidigital number, since it uses as much as digits as its factorization.

220010209979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31430030004.

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

The spelling of 220010209979 in words is "two hundred twenty billion, ten million, two hundred nine thousand, nine hundred seventy-nine".