21884089436 has 12 divisors (see below), whose sum is σ = 41778716280. Its totient is φ = 9947313360.

The previous prime is 21884089433. The next prime is 21884089463. The reversal of 21884089436 is 63498048812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884089433) 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, 248682791 + ... + 248682878.

It is an arithmetic number, because the mean of its divisors is an integer number (3481559690).

Almost surely, 2^21884089436 is an apocalyptic number.

It is an amenable number.

21884089436 is a deficient number, since it is larger than the sum of its proper divisors (19894626844).

21884089436 is a wasteful number, since it uses less digits than its factorization.

21884089436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497365684 (or 497365682 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 21884089436 in words is "twenty-one billion, eight hundred eighty-four million, eighty-nine thousand, four hundred thirty-six".