21936869967 has 8 divisors (see below), whose sum is σ = 29280648240. Its totient is φ = 14608835840.

The previous prime is 21936869953. The next prime is 21936869987. The reversal of 21936869967 is 76996863912.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21936869967 - 2⁷ = 21936869839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21936869898 and 21936869907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21936869947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3932784 + ... + 3938357.

It is an arithmetic number, because the mean of its divisors is an integer number (3660081030).

Almost surely, 2^21936869967 is an apocalyptic number.

21936869967 is a deficient number, since it is larger than the sum of its proper divisors (7343778273).

21936869967 is an equidigital number, since it uses as much as digits as its factorization.

21936869967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7872073.

The product of its digits is 52907904, while the sum is 66.

The spelling of 21936869967 in words is "twenty-one billion, nine hundred thirty-six million, eight hundred sixty-nine thousand, nine hundred sixty-seven".