22649411821 has 4 divisors (see below), whose sum is σ = 22857204700. Its totient is φ = 22441618944.

The previous prime is 22649411803. The next prime is 22649411857. The reversal of 22649411821 is 12811494622.

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 20516265225 + 2133146596 = 143235^2 + 46186^2 .

It is a cyclic number.

It is not a de Polignac number, because 22649411821 - 2⁷ = 22649411693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649411881) 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, 103896276 + ... + 103896493.

It is an arithmetic number, because the mean of its divisors is an integer number (5714301175).

Almost surely, 2^22649411821 is an apocalyptic number.

It is an amenable number.

22649411821 is a deficient number, since it is larger than the sum of its proper divisors (207792879).

22649411821 is a wasteful number, since it uses less digits than its factorization.

22649411821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207792878.

The product of its digits is 55296, while the sum is 40.

The spelling of 22649411821 in words is "twenty-two billion, six hundred forty-nine million, four hundred eleven thousand, eight hundred twenty-one".