21999196799 has 4 divisors (see below), whose sum is σ = 22467264864. Its totient is φ = 21531128736.

The previous prime is 21999196787. The next prime is 21999196801. The reversal of 21999196799 is 99769199912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21999196799 is a prime.

It is a super-2 number, since 2×21999196799² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21999186799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234033962 + ... + 234034055.

It is an arithmetic number, because the mean of its divisors is an integer number (5616816216).

Almost surely, 2^21999196799 is an apocalyptic number.

21999196799 is a deficient number, since it is larger than the sum of its proper divisors (468068065).

21999196799 is an equidigital number, since it uses as much as digits as its factorization.

21999196799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468068064.

The product of its digits is 44641044, while the sum is 71.

The spelling of 21999196799 in words is "twenty-one billion, nine hundred ninety-nine million, one hundred ninety-six thousand, seven hundred ninety-nine".