22019890500 has 480 divisors, whose sum is σ = 74918844000. Its totient is φ = 5626368000.

The previous prime is 22019890499. The next prime is 22019890531. The reversal of 22019890500 is 509891022.

It can be written as a sum of positive squares in 16 ways, for example, as 21828289536 + 191600964 = 147744^2 + 13842^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 147784426 + ... + 147784574.

It is an arithmetic number, because the mean of its divisors is an integer number (156080925).

Almost surely, 2^22019890500 is an apocalyptic number.

22019890500 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 22019890500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37459422000).

22019890500 is an abundant number, since it is smaller than the sum of its proper divisors (52898953500).

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

22019890500 is a wasteful number, since it uses less digits than its factorization.

22019890500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 22019890500 in words is "twenty-two billion, nineteen million, eight hundred ninety thousand, five hundred".