21823733091 has 16 divisors (see below), whose sum is σ = 29273287680. Its totient is φ = 14461745760.

The previous prime is 21823733077. The next prime is 21823733123. The reversal of 21823733091 is 19033732812.

It is not a de Polignac number, because 21823733091 - 2⁶ = 21823733027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21823733021) 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 15 ways as a sum of consecutive naturals, for example, 1261486 + ... + 1278668.

It is an arithmetic number, because the mean of its divisors is an integer number (1829580480).

Almost surely, 2^21823733091 is an apocalyptic number.

21823733091 is a deficient number, since it is larger than the sum of its proper divisors (7449554589).

21823733091 is a wasteful number, since it uses less digits than its factorization.

21823733091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19706.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 21823733091 in words is "twenty-one billion, eight hundred twenty-three million, seven hundred thirty-three thousand, ninety-one".