22720266240 has 480 divisors, whose sum is σ = 85158549504. Its totient is φ = 5064622080.

The previous prime is 22720266229. The next prime is 22720266263. The reversal of 22720266240 is 4266202722.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80854900 + ... + 80855180.

Almost surely, 2^22720266240 is an apocalyptic number.

22720266240 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 22720266240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42579274752).

22720266240 is an abundant number, since it is smaller than the sum of its proper divisors (62438283264).

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

22720266240 is an equidigital number, since it uses as much as digits as its factorization.

22720266240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

Adding to 22720266240 its reverse (4266202722), we get a palindrome (26986468962).

The spelling of 22720266240 in words is "twenty-two billion, seven hundred twenty million, two hundred sixty-six thousand, two hundred forty".