22555533840 has 320 divisors, whose sum is σ = 84453642240. Its totient is φ = 4864665600.

The previous prime is 22555533799. The next prime is 22555533929. The reversal of 22555533840 is 4833555522.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 22555533792 and 22555533801.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8840565 + ... + 8843115.

It is an arithmetic number, because the mean of its divisors is an integer number (263917632).

Almost surely, 2^22555533840 is an apocalyptic number.

22555533840 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 22555533840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42226821120).

22555533840 is an abundant number, since it is smaller than the sum of its proper divisors (61898108400).

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

22555533840 is a wasteful number, since it uses less digits than its factorization.

22555533840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 22555533840 in words is "twenty-two billion, five hundred fifty-five million, five hundred thirty-three thousand, eight hundred forty".