22004039977 has 4 divisors (see below), whose sum is σ = 22004345556. Its totient is φ = 22003734400.

The previous prime is 22004039957. The next prime is 22004040013. The reversal of 22004039977 is 77993040022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3524084496 + 18479955481 = 59364^2 + 135941^2 .

It is a cyclic number.

It is not a de Polignac number, because 22004039977 - 2¹¹ = 22004037929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22004039927) 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, 21477 + ... + 210877.

It is an arithmetic number, because the mean of its divisors is an integer number (5501086389).

Almost surely, 2^22004039977 is an apocalyptic number.

It is an amenable number.

22004039977 is a deficient number, since it is larger than the sum of its proper divisors (305579).

22004039977 is a wasteful number, since it uses less digits than its factorization.

22004039977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305578.

The product of its (nonzero) digits is 190512, while the sum is 43.

Adding to 22004039977 its reverse (77993040022), we get a palindrome (99997079999).

The spelling of 22004039977 in words is "twenty-two billion, four million, thirty-nine thousand, nine hundred seventy-seven".