22317717720 has 128 divisors (see below), whose sum is σ = 68890947840. Its totient is φ = 5779745280.

The previous prime is 22317717677. The next prime is 22317717727. The reversal of 22317717720 is 2771771322.

It is a happy number.

It is a super-3 number, since 3×22317717720³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22317717727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2530839 + ... + 2539641.

It is an arithmetic number, because the mean of its divisors is an integer number (538210530).

Almost surely, 2^22317717720 is an apocalyptic number.

22317717720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22317717720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34445473920).

22317717720 is an abundant number, since it is smaller than the sum of its proper divisors (46573230120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22317717720 is a wasteful number, since it uses less digits than its factorization.

22317717720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9425 (or 9421 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 39.

The spelling of 22317717720 in words is "twenty-two billion, three hundred seventeen million, seven hundred seventeen thousand, seven hundred twenty".