22028267520 has 780 divisors, whose sum is σ = 92197109664. Its totient is φ = 5016453120.

The previous prime is 22028267453. The next prime is 22028267539. The reversal of 22028267520 is 2576282022.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 81284985 + ... + 81285255.

Almost surely, 2^22028267520 is an apocalyptic number.

22028267520 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 22028267520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46098554832).

22028267520 is an abundant number, since it is smaller than the sum of its proper divisors (70168842144).

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

22028267520 is an equidigital number, since it uses as much as digits as its factorization.

22028267520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 22028267520 in words is "twenty-two billion, twenty-eight million, two hundred sixty-seven thousand, five hundred twenty".