21736376233 has 24 divisors (see below), whose sum is σ = 26040055104. Its totient is φ = 18020444640.

The previous prime is 21736376213. The next prime is 21736376281. The reversal of 21736376233 is 33267363712.

It is not a de Polignac number, because 21736376233 - 2²¹ = 21734279081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21736376233.

It is not an unprimeable number, because it can be changed into a prime (21736376213) 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 23 ways as a sum of consecutive naturals, for example, 47316 + ... + 213802.

It is an arithmetic number, because the mean of its divisors is an integer number (1085002296).

Almost surely, 2^21736376233 is an apocalyptic number.

It is an amenable number.

21736376233 is a deficient number, since it is larger than the sum of its proper divisors (4303678871).

21736376233 is a wasteful number, since it uses less digits than its factorization.

21736376233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166605 (or 166594 counting only the distinct ones).

The product of its digits is 571536, while the sum is 43.

The spelling of 21736376233 in words is "twenty-one billion, seven hundred thirty-six million, three hundred seventy-six thousand, two hundred thirty-three".