21836446705 has 32 divisors (see below), whose sum is σ = 28252074240. Its totient is φ = 16142776320.

The previous prime is 21836446699. The next prime is 21836446727. The reversal of 21836446705 is 50764463812.

It is not a de Polignac number, because 21836446705 - 2⁹ = 21836446193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1764981 + ... + 1777309.

It is an arithmetic number, because the mean of its divisors is an integer number (882877320).

Almost surely, 2^21836446705 is an apocalyptic number.

It is an amenable number.

21836446705 is a deficient number, since it is larger than the sum of its proper divisors (6415627535).

21836446705 is a wasteful number, since it uses less digits than its factorization.

21836446705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12729.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 21836446705 in words is "twenty-one billion, eight hundred thirty-six million, four hundred forty-six thousand, seven hundred five".