21422211747 has 4 divisors (see below), whose sum is σ = 28562949000. Its totient is φ = 14281474496.

The previous prime is 21422211737. The next prime is 21422211761. The reversal of 21422211747 is 74711222412.

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

It is a cyclic number.

It is not a de Polignac number, because 21422211747 - 2⁷ = 21422211619 is a prime.

It is a super-2 number, since 2×21422211747² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21422211737) 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, 3570368622 + ... + 3570368627.

It is an arithmetic number, because the mean of its divisors is an integer number (7140737250).

Almost surely, 2^21422211747 is an apocalyptic number.

21422211747 is a deficient number, since it is larger than the sum of its proper divisors (7140737253).

21422211747 is an equidigital number, since it uses as much as digits as its factorization.

21422211747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140737252.

The product of its digits is 12544, while the sum is 33.

The spelling of 21422211747 in words is "twenty-one billion, four hundred twenty-two million, two hundred eleven thousand, seven hundred forty-seven".