22187131830 has 192 divisors, whose sum is σ = 61729873920. Its totient is φ = 5519404800.

The previous prime is 22187131789. The next prime is 22187131867. The reversal of 22187131830 is 3813178122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9476460 + ... + 9478800.

It is an arithmetic number, because the mean of its divisors is an integer number (321509760).

Almost surely, 2^22187131830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22187131830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30864936960).

22187131830 is an abundant number, since it is smaller than the sum of its proper divisors (39542742090).

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

22187131830 is a wasteful number, since it uses less digits than its factorization.

22187131830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507 (or 2504 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 22187131830 in words is "twenty-two billion, one hundred eighty-seven million, one hundred thirty-one thousand, eight hundred thirty".