21823060577 has 4 divisors (see below), whose sum is σ = 21850036740. Its totient is φ = 21796084416.

The previous prime is 21823060573. The next prime is 21823060631. The reversal of 21823060577 is 77506032812.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7249500736 + 14573559841 = 85144^2 + 120721^2 .

It is a cyclic number.

It is not a de Polignac number, because 21823060577 - 2² = 21823060573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21823060573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13486868 + ... + 13488485.

It is an arithmetic number, because the mean of its divisors is an integer number (5462509185).

Almost surely, 2^21823060577 is an apocalyptic number.

It is an amenable number.

21823060577 is a deficient number, since it is larger than the sum of its proper divisors (26976163).

21823060577 is an equidigital number, since it uses as much as digits as its factorization.

21823060577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26976162.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 21823060577 in words is "twenty-one billion, eight hundred twenty-three million, sixty thousand, five hundred seventy-seven".