21230202032 has 20 divisors (see below), whose sum is σ = 44297633520. Its totient is φ = 9798554688.

The previous prime is 21230202011. The next prime is 21230202043. The reversal of 21230202032 is 23020203212.

It is a self number, because there is not a number n which added to its sum of digits gives 21230202032.

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 3 ways as a sum of consecutive naturals, for example, 51033932 + ... + 51034347.

It is an arithmetic number, because the mean of its divisors is an integer number (2214881676).

Almost surely, 2^21230202032 is an apocalyptic number.

It is an amenable number.

21230202032 is an abundant number, since it is smaller than the sum of its proper divisors (23067431488).

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

21230202032 is a wasteful number, since it uses less digits than its factorization.

21230202032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102068300 (or 102068294 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21230202032 its reverse (23020203212), we get a palindrome (44250405244).

The spelling of 21230202032 in words is "twenty-one billion, two hundred thirty million, two hundred two thousand, thirty-two".