22299643440 has 280 divisors, whose sum is σ = 78329906208. Its totient is φ = 5901050880.

The previous prime is 22299643439. The next prime is 22299643441. The reversal of 22299643440 is 4434699222.

It is an interprime number because it is at equal distance from previous prime (22299643439) and next prime (22299643441).

It is a super-2 number, since 2×22299643440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (22299643441) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 7988445 + ... + 7991235.

Almost surely, 2^22299643440 is an apocalyptic number.

22299643440 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 22299643440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39164953104).

22299643440 is an abundant number, since it is smaller than the sum of its proper divisors (56030262768).

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

22299643440 is a wasteful number, since it uses less digits than its factorization.

22299643440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 22299643440 in words is "twenty-two billion, two hundred ninety-nine million, six hundred forty-three thousand, four hundred forty".