21299609585786 has 24 divisors (see below), whose sum is σ = 37182516144480. Its totient is φ = 9124260391512.

The previous prime is 21299609585767. The next prime is 21299609585803. The reversal of 21299609585786 is 68758590699212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49112966 + ... + 49544753.

It is an arithmetic number, because the mean of its divisors is an integer number (1549271506020).

Almost surely, 2^{21299609585786} is an apocalyptic number.

21299609585786 is a deficient number, since it is larger than the sum of its proper divisors (15882906558694).

21299609585786 is a wasteful number, since it uses less digits than its factorization.

21299609585786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98659938 (or 98659931 counting only the distinct ones).

The product of its (nonzero) digits is 1175731200, while the sum is 77.

The spelling of 21299609585786 in words is "twenty-one trillion, two hundred ninety-nine billion, six hundred nine million, five hundred eighty-five thousand, seven hundred eighty-six".