22228816720 has 40 divisors (see below), whose sum is σ = 56380364640. Its totient is φ = 8083205760.

The previous prime is 22228816717. The next prime is 22228816721. The reversal of 22228816720 is 2761882222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22228816721) 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, 12629130 + ... + 12630889.

It is an arithmetic number, because the mean of its divisors is an integer number (1409509116).

Almost surely, 2^22228816720 is an apocalyptic number.

22228816720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22228816720 is an abundant number, since it is smaller than the sum of its proper divisors (34151547920).

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

22228816720 is a wasteful number, since it uses less digits than its factorization.

22228816720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25260043 (or 25260037 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 22228816720 in words is "twenty-two billion, two hundred twenty-eight million, eight hundred sixteen thousand, seven hundred twenty".