21195170210 has 32 divisors (see below), whose sum is σ = 38287226880. Its totient is φ = 8447908608.

The previous prime is 21195170203. The next prime is 21195170233. The reversal of 21195170210 is 1207159112.

It is a happy number.

21195170210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5586074 + ... + 5589866.

It is an arithmetic number, because the mean of its divisors is an integer number (1196475840).

Almost surely, 2^21195170210 is an apocalyptic number.

21195170210 is a deficient number, since it is larger than the sum of its proper divisors (17092056670).

21195170210 is a wasteful number, since it uses less digits than its factorization.

21195170210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 21195170210 in words is "twenty-one billion, one hundred ninety-five million, one hundred seventy thousand, two hundred ten".