22140781888 has 28 divisors (see below), whose sum is σ = 43940453140. Its totient is φ = 11069171712.

The previous prime is 22140781867. The next prime is 22140781889. The reversal of 22140781888 is 88818704122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8048242944 + 14092538944 = 89712^2 + 118712^2 .

It is a super-2 number, since 2×22140781888² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140781889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943870 + ... + 967042.

Almost surely, 2^22140781888 is an apocalyptic number.

It is an amenable number.

22140781888 is a deficient number, since it is larger than the sum of its proper divisors (21799671252).

22140781888 is a wasteful number, since it uses less digits than its factorization.

22140781888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38114 (or 38104 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 49.

The spelling of 22140781888 in words is "twenty-two billion, one hundred forty million, seven hundred eighty-one thousand, eight hundred eighty-eight".