21331789255 has 16 divisors (see below), whose sum is σ = 29430213120. Its totient is φ = 14539918752.

The previous prime is 21331789249. The next prime is 21331789291. The reversal of 21331789255 is 55298713312.

It is a cyclic number.

It is not a de Polignac number, because 21331789255 - 2⁹ = 21331788743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1818945 + ... + 1830634.

It is an arithmetic number, because the mean of its divisors is an integer number (1839388320).

Almost surely, 2^21331789255 is an apocalyptic number.

21331789255 is a deficient number, since it is larger than the sum of its proper divisors (8098423865).

21331789255 is a wasteful number, since it uses less digits than its factorization.

21331789255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649758.

The product of its digits is 453600, while the sum is 46.

The spelling of 21331789255 in words is "twenty-one billion, three hundred thirty-one million, seven hundred eighty-nine thousand, two hundred fifty-five".