21173504262 has 32 divisors (see below), whose sum is σ = 42992197632. Its totient is φ = 6951115584.

The previous prime is 21173504173. The next prime is 21173504279. The reversal of 21173504262 is 26240537112.

21173504262 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2983 + ... + 205805.

It is an arithmetic number, because the mean of its divisors is an integer number (1343506176).

Almost surely, 2^21173504262 is an apocalyptic number.

21173504262 is an abundant number, since it is smaller than the sum of its proper divisors (21818693370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21173504262 is a wasteful number, since it uses less digits than its factorization.

21173504262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203092.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21173504262 in words is "twenty-one billion, one hundred seventy-three million, five hundred four thousand, two hundred sixty-two".