22258885220 has 144 divisors (see below), whose sum is σ = 55890378432. Its totient is φ = 7380472320.

The previous prime is 22258885163. The next prime is 22258885261. The reversal of 22258885220 is 2258885222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3082334 + ... + 3089546.

It is an arithmetic number, because the mean of its divisors is an integer number (388127628).

Almost surely, 2^22258885220 is an apocalyptic number.

22258885220 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 22258885220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27945189216).

22258885220 is an abundant number, since it is smaller than the sum of its proper divisors (33631493212).

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

22258885220 is a wasteful number, since it uses less digits than its factorization.

22258885220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7342 (or 7327 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 44.

The spelling of 22258885220 in words is "twenty-two billion, two hundred fifty-eight million, eight hundred eighty-five thousand, two hundred twenty".