21693313099 has 8 divisors (see below), whose sum is σ = 23091642000. Its totient is φ = 20320641792.

The previous prime is 21693313073. The next prime is 21693313111. The reversal of 21693313099 is 99031339612.

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 21693313099 - 2¹⁵ = 21693280331 is a prime.

It is a super-2 number, since 2×21693313099² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21693313039) 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, 6412654 + ... + 6416035.

It is an arithmetic number, because the mean of its divisors is an integer number (2886455250).

Almost surely, 2^21693313099 is an apocalyptic number.

21693313099 is a deficient number, since it is larger than the sum of its proper divisors (1398328901).

21693313099 is a wasteful number, since it uses less digits than its factorization.

21693313099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12828797.

The product of its (nonzero) digits is 236196, while the sum is 46.

It can be divided in two parts, 216933 and 13099, that added together give a palindrome (230032).

The spelling of 21693313099 in words is "twenty-one billion, six hundred ninety-three million, three hundred thirteen thousand, ninety-nine".