21652810583 has 4 divisors (see below), whose sum is σ = 21654336240. Its totient is φ = 21651284928.

The previous prime is 21652810579. The next prime is 21652810607. The reversal of 21652810583 is 38501825612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21652810583 - 2² = 21652810579 is a prime.

It is a super-2 number, since 2×21652810583² (a number of 21 digits) contains 22 as substring.

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 21652810583.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652810523) 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 3 ways as a sum of consecutive naturals, for example, 741338 + ... + 769991.

It is an arithmetic number, because the mean of its divisors is an integer number (5413584060).

Almost surely, 2^21652810583 is an apocalyptic number.

21652810583 is a deficient number, since it is larger than the sum of its proper divisors (1525657).

21652810583 is a wasteful number, since it uses less digits than its factorization.

21652810583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525656.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 21652810583 in words is "twenty-one billion, six hundred fifty-two million, eight hundred ten thousand, five hundred eighty-three".