21873609367 has 2 divisors, whose sum is σ = 21873609368. Its totient is φ = 21873609366.

The previous prime is 21873609361. The next prime is 21873609379. The reversal of 21873609367 is 76390637812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21873609367 - 2⁷ = 21873609239 is a prime.

It is a super-2 number, since 2×21873609367² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21873609361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10936804683 + 10936804684.

It is an arithmetic number, because the mean of its divisors is an integer number (10936804684).

Almost surely, 2^21873609367 is an apocalyptic number.

21873609367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21873609367 is an equidigital number, since it uses as much as digits as its factorization.

21873609367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 21873609367 in words is "twenty-one billion, eight hundred seventy-three million, six hundred nine thousand, three hundred sixty-seven".