21144592823 has 2 divisors, whose sum is σ = 21144592824. Its totient is φ = 21144592822.

The previous prime is 21144592813. The next prime is 21144592837. The reversal of 21144592823 is 32829544112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21144592823 - 2⁶ = 21144592759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144592813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572296411 + 10572296412.

It is an arithmetic number, because the mean of its divisors is an integer number (10572296412).

Almost surely, 2^21144592823 is an apocalyptic number.

21144592823 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144592823 is an equidigital number, since it uses as much as digits as its factorization.

21144592823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The spelling of 21144592823 in words is "twenty-one billion, one hundred forty-four million, five hundred ninety-two thousand, eight hundred twenty-three".