21735447730606 has 16 divisors (see below), whose sum is σ = 32719358223360. Its totient is φ = 10829037575160.

The previous prime is 21735447730561. The next prime is 21735447730669. The reversal of 21735447730606 is 60603774453712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9624636 + ... + 11666383.

It is an arithmetic number, because the mean of its divisors is an integer number (2044959888960).

Almost surely, 2^{21735447730606} is an apocalyptic number.

21735447730606 is a deficient number, since it is larger than the sum of its proper divisors (10983910492754).

21735447730606 is a wasteful number, since it uses less digits than its factorization.

21735447730606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21292839.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 21735447730606 in words is "twenty-one trillion, seven hundred thirty-five billion, four hundred forty-seven million, seven hundred thirty thousand, six hundred six".