22185139060 has 72 divisors (see below), whose sum is σ = 57383117064. Its totient is φ = 7158896640.

The previous prime is 22185139019. The next prime is 22185139091. The reversal of 22185139060 is 6093158122.

It can be written as a sum of positive squares in 4 ways, for example, as 9347795856 + 12837343204 = 96684^2 + 113302^2 .

It is a super-2 number, since 2×22185139060² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 649161 + ... + 682480.

It is an arithmetic number, because the mean of its divisors is an integer number (796987737).

Almost surely, 2^22185139060 is an apocalyptic number.

22185139060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22185139060 is an abundant number, since it is smaller than the sum of its proper divisors (35197978004).

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

22185139060 is a wasteful number, since it uses less digits than its factorization.

22185139060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331681 (or 1331672 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 22185139060 in words is "twenty-two billion, one hundred eighty-five million, one hundred thirty-nine thousand, sixty".