21922453066 has 4 divisors (see below), whose sum is σ = 32883679602. Its totient is φ = 10961226532.

The previous prime is 21922453009. The next prime is 21922453067. The reversal of 21922453066 is 66035422912.

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

It can be written as a sum of positive squares in only one way, i.e., 12853890625 + 9068562441 = 113375^2 + 95229^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21922453067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5480613265 + ... + 5480613268.

Almost surely, 2^21922453066 is an apocalyptic number.

21922453066 is a deficient number, since it is larger than the sum of its proper divisors (10961226536).

21922453066 is a wasteful number, since it uses less digits than its factorization.

21922453066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961226535.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 21922453066 its reverse (66035422912), we get a palindrome (87957875978).

The spelling of 21922453066 in words is "twenty-one billion, nine hundred twenty-two million, four hundred fifty-three thousand, sixty-six".