21732811093 has 12 divisors (see below), whose sum is σ = 25627344780. Its totient is φ = 18372940992.

The previous prime is 21732811049. The next prime is 21732811099. The reversal of 21732811093 is 39011823712.

It can be written as a sum of positive squares in 2 ways, for example, as 14683865329 + 7048945764 = 121177^2 + 83958^2 .

It is not a de Polignac number, because 21732811093 - 2³³ = 13142876501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21732811099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3034278 + ... + 3041431.

It is an arithmetic number, because the mean of its divisors is an integer number (2135612065).

Almost surely, 2^21732811093 is an apocalyptic number.

It is an amenable number.

21732811093 is a deficient number, since it is larger than the sum of its proper divisors (3894533687).

21732811093 is an equidigital number, since it uses as much as digits as its factorization.

21732811093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075796 (or 6075789 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 21732811093 in words is "twenty-one billion, seven hundred thirty-two million, eight hundred eleven thousand, ninety-three".