22220115720 has 96 divisors (see below), whose sum is σ = 73271338560. Its totient is φ = 5386691200.

The previous prime is 22220115703. The next prime is 22220115721. The reversal of 22220115720 is 2751102222.

It is a super-2 number, since 2×22220115720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (22220115721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750636 + ... + 779675.

It is an arithmetic number, because the mean of its divisors is an integer number (763243110).

Almost surely, 2^22220115720 is an apocalyptic number.

22220115720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220115720 is an abundant number, since it is smaller than the sum of its proper divisors (51051222840).

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

22220115720 is a wasteful number, since it uses less digits than its factorization.

22220115720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530347 (or 1530332 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

Adding to 22220115720 its reverse (2751102222), we get a palindrome (24971217942).

The spelling of 22220115720 in words is "twenty-two billion, two hundred twenty million, one hundred fifteen thousand, seven hundred twenty".