22171237640 has 16 divisors (see below), whose sum is σ = 49885284780. Its totient is φ = 8868495040.

The previous prime is 22171237609. The next prime is 22171237657. The reversal of 22171237640 is 4673217122.

It can be written as a sum of positive squares in 2 ways, for example, as 20798831524 + 1372406116 = 144218^2 + 37046^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22171237640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277140431 + ... + 277140510.

Almost surely, 2^22171237640 is an apocalyptic number.

22171237640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22171237640 is an abundant number, since it is smaller than the sum of its proper divisors (27714047140).

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

22171237640 is a wasteful number, since it uses less digits than its factorization.

22171237640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554280952 (or 554280948 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 22171237640 in words is "twenty-two billion, one hundred seventy-one million, two hundred thirty-seven thousand, six hundred forty".