22117777309 has 4 divisors (see below), whose sum is σ = 22535093916. Its totient is φ = 21700460704.

The previous prime is 22117777307. The next prime is 22117777321. The reversal of 22117777309 is 90377771122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7856163225 + 14261614084 = 88635^2 + 119422^2 .

It is a cyclic number.

It is not a de Polignac number, because 22117777309 - 2¹ = 22117777307 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 (22117777307) 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, 208658224 + ... + 208658329.

It is an arithmetic number, because the mean of its divisors is an integer number (5633773479).

Almost surely, 2^22117777309 is an apocalyptic number.

It is an amenable number.

22117777309 is a deficient number, since it is larger than the sum of its proper divisors (417316607).

22117777309 is an equidigital number, since it uses as much as digits as its factorization.

22117777309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417316606.

The product of its (nonzero) digits is 259308, while the sum is 46.

The spelling of 22117777309 in words is "twenty-two billion, one hundred seventeen million, seven hundred seventy-seven thousand, three hundred nine".