22138882490 has 16 divisors (see below), whose sum is σ = 39853610280. Its totient is φ = 8854748160.

The previous prime is 22138882481. The next prime is 22138882529. The reversal of 22138882490 is 9428883122.

It can be written as a sum of positive squares in 4 ways, for example, as 13284637081 + 8854245409 = 115259^2 + 94097^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22046 + ... + 211574.

Almost surely, 2^22138882490 is an apocalyptic number.

22138882490 is a deficient number, since it is larger than the sum of its proper divisors (17714727790).

22138882490 is a wasteful number, since it uses less digits than its factorization.

22138882490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201217.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 22138882490 in words is "twenty-two billion, one hundred thirty-eight million, eight hundred eighty-two thousand, four hundred ninety".