21622475305 has 8 divisors (see below), whose sum is σ = 26045629632. Its totient is φ = 17232207408.

The previous prime is 21622475299. The next prime is 21622475339. The reversal of 21622475305 is 50357422612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21622475305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8220159 + ... + 8222788.

It is an arithmetic number, because the mean of its divisors is an integer number (3255703704).

Almost surely, 2^21622475305 is an apocalyptic number.

It is an amenable number.

21622475305 is a deficient number, since it is larger than the sum of its proper divisors (4423154327).

21622475305 is a wasteful number, since it uses less digits than its factorization.

21622475305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443215.

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 21622475305 its reverse (50357422612), we get a palindrome (71979897917).

The spelling of 21622475305 in words is "twenty-one billion, six hundred twenty-two million, four hundred seventy-five thousand, three hundred five".