22000887378 has 18 divisors (see below), whose sum is σ = 47669952837. Its totient is φ = 7333419360.

The previous prime is 22000887373. The next prime is 22000887401. The reversal of 22000887378 is 87378800022.

It can be written as a sum of positive squares in 2 ways, for example, as 21786645609 + 214241769 = 147603^2 + 14637^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104883.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22000887373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 611818 + ... + 646778.

Almost surely, 2^22000887378 is an apocalyptic number.

22000887378 is an abundant number, since it is smaller than the sum of its proper divisors (25669065459).

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

22000887378 is an frugal number, since it uses more digits than its factorization.

22000887378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69930 (or 34966 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 22000887378 in words is "twenty-two billion, eight hundred eighty-seven thousand, three hundred seventy-eight".