21202401232 has 20 divisors (see below), whose sum is σ = 41503156996. Its totient is φ = 10491909120.

The previous prime is 21202401223. The next prime is 21202401263. The reversal of 21202401232 is 23210420212.

It can be written as a sum of positive squares in 2 ways, for example, as 12395704896 + 8806696336 = 111336^2 + 93844^2 .

It is a congruent number.

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, 6829119 + ... + 6832222.

Almost surely, 2^21202401232 is an apocalyptic number.

It is an amenable number.

21202401232 is a deficient number, since it is larger than the sum of its proper divisors (20300755764).

21202401232 is a wasteful number, since it uses less digits than its factorization.

21202401232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13661446 (or 13661440 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202401232 its reverse (23210420212), we get a palindrome (44412821444).

The spelling of 21202401232 in words is "twenty-one billion, two hundred two million, four hundred one thousand, two hundred thirty-two".