21029175910 has 16 divisors (see below), whose sum is σ = 37860217776. Its totient is φ = 8409959008.

The previous prime is 21029175901. The next prime is 21029175983. The reversal of 21029175910 is 1957192012.

It is a self number, because there is not a number n which added to its sum of digits gives 21029175910.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161704 + ... + 261163.

It is an arithmetic number, because the mean of its divisors is an integer number (2366263611).

Almost surely, 2^21029175910 is an apocalyptic number.

21029175910 is a deficient number, since it is larger than the sum of its proper divisors (16831041866).

21029175910 is a wasteful number, since it uses less digits than its factorization.

21029175910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427847.

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 21029175910 in words is "twenty-one billion, twenty-nine million, one hundred seventy-five thousand, nine hundred ten".