21431834202 has 32 divisors (see below), whose sum is σ = 43210392192. Its totient is φ = 7086239744.

The previous prime is 21431834197. The next prime is 21431834233. The reversal of 21431834202 is 20243813412.

It is a self number, because there is not a number n which added to its sum of digits gives 21431834202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114138 + ... + 1133210.

It is an arithmetic number, because the mean of its divisors is an integer number (1350324756).

Almost surely, 2^21431834202 is an apocalyptic number.

21431834202 is an abundant number, since it is smaller than the sum of its proper divisors (21778557990).

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

21431834202 is a wasteful number, since it uses less digits than its factorization.

21431834202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20582.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 21431834202 in words is "twenty-one billion, four hundred thirty-one million, eight hundred thirty-four thousand, two hundred two".