21722441707 has 2 divisors, whose sum is σ = 21722441708. Its totient is φ = 21722441706.

The previous prime is 21722441683. The next prime is 21722441711. The reversal of 21722441707 is 70714422712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21722441707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21722445707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10861220853 + 10861220854.

It is an arithmetic number, because the mean of its divisors is an integer number (10861220854).

Almost surely, 2^21722441707 is an apocalyptic number.

21722441707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21722441707 is an equidigital number, since it uses as much as digits as its factorization.

21722441707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 37.

The spelling of 21722441707 in words is "twenty-one billion, seven hundred twenty-two million, four hundred forty-one thousand, seven hundred seven".