22047063821 has 2 divisors, whose sum is σ = 22047063822. Its totient is φ = 22047063820.

The previous prime is 22047063799. The next prime is 22047063823. The reversal of 22047063821 is 12836074022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18658194025 + 3388869796 = 136595^2 + 58214^2 .

It is a cyclic number.

It is not a de Polignac number, because 22047063821 - 2⁶ = 22047063757 is a prime.

Together with 22047063823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22047063823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11023531910 + 11023531911.

It is an arithmetic number, because the mean of its divisors is an integer number (11023531911).

Almost surely, 2^22047063821 is an apocalyptic number.

It is an amenable number.

22047063821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22047063821 is an equidigital number, since it uses as much as digits as its factorization.

22047063821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 22047063821 in words is "twenty-two billion, forty-seven million, sixty-three thousand, eight hundred twenty-one".