21232320202 has 8 divisors (see below), whose sum is σ = 31849966116. Its totient is φ = 10615664832.

The previous prime is 21232320181. The next prime is 21232320233. The reversal of 21232320202 is 20202323212.

It can be written as a sum of positive squares in 2 ways, for example, as 20457866961 + 774453241 = 143031^2 + 27829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21232320202² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21232320202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191503 + ... + 281314.

Almost surely, 2^21232320202 is an apocalyptic number.

21232320202 is a deficient number, since it is larger than the sum of its proper divisors (10617645914).

21232320202 is a wasteful number, since it uses less digits than its factorization.

21232320202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495272.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21232320202 its reverse (20202323212), we get a palindrome (41434643414).

The spelling of 21232320202 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty thousand, two hundred two".