22721764309 has 8 divisors (see below), whose sum is σ = 23458449920. Its totient is φ = 21985311600.

The previous prime is 22721764237. The next prime is 22721764313. The reversal of 22721764309 is 90346712722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22721764309 - 2⁷ = 22721764181 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 (22721764339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152179 + ... + 261919.

It is an arithmetic number, because the mean of its divisors is an integer number (2932306240).

Almost surely, 2^22721764309 is an apocalyptic number.

It is an amenable number.

22721764309 is a deficient number, since it is larger than the sum of its proper divisors (736685611).

22721764309 is a wasteful number, since it uses less digits than its factorization.

22721764309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116451.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 22721764309 in words is "twenty-two billion, seven hundred twenty-one million, seven hundred sixty-four thousand, three hundred nine".