21967793629 has 2 divisors, whose sum is σ = 21967793630. Its totient is φ = 21967793628.

The previous prime is 21967793527. The next prime is 21967793647. The reversal of 21967793629 is 92639776912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21911992729 + 55800900 = 148027^2 + 7470^2 .

It is a cyclic number.

It is not a de Polignac number, because 21967793629 - 2⁷ = 21967793501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21967793699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10983896814 + 10983896815.

It is an arithmetic number, because the mean of its divisors is an integer number (10983896815).

Almost surely, 2^21967793629 is an apocalyptic number.

It is an amenable number.

21967793629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21967793629 is an equidigital number, since it uses as much as digits as its factorization.

21967793629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15431472, while the sum is 61.

The spelling of 21967793629 in words is "twenty-one billion, nine hundred sixty-seven million, seven hundred ninety-three thousand, six hundred twenty-nine".