21610105699 has 16 divisors (see below), whose sum is σ = 27753449472. Its totient is φ = 16354708128.

The previous prime is 21610105687. The next prime is 21610105723. The reversal of 21610105699 is 99650101612.

It is a cyclic number.

It is not a de Polignac number, because 21610105699 - 2⁵ = 21610105667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21610105619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5160379 + ... + 5164564.

It is an arithmetic number, because the mean of its divisors is an integer number (1734590592).

Almost surely, 2^21610105699 is an apocalyptic number.

21610105699 is a deficient number, since it is larger than the sum of its proper divisors (6143343773).

21610105699 is a wasteful number, since it uses less digits than its factorization.

21610105699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324986.

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 21610105699 in words is "twenty-one billion, six hundred ten million, one hundred five thousand, six hundred ninety-nine".