21652801223 has 8 divisors (see below), whose sum is σ = 23348335920. Its totient is φ = 20012857920.

The previous prime is 21652801211. The next prime is 21652801241. The reversal of 21652801223 is 32210825612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21652801223 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 21652801223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652801283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13897040 + ... + 13898597.

It is an arithmetic number, because the mean of its divisors is an integer number (2918541990).

Almost surely, 2^21652801223 is an apocalyptic number.

21652801223 is a deficient number, since it is larger than the sum of its proper divisors (1695534697).

21652801223 is a wasteful number, since it uses less digits than its factorization.

21652801223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27795697.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 21652801223 in words is "twenty-one billion, six hundred fifty-two million, eight hundred one thousand, two hundred twenty-three".