21245245332 has 24 divisors (see below), whose sum is σ = 49667038176. Its totient is φ = 7068205728.

The previous prime is 21245245319. The next prime is 21245245349. The reversal of 21245245332 is 23354254212.

It is a junction number, because it is equal to n+sod(n) for n = 21245245293 and 21245245302.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1686303 + ... + 1698854.

It is an arithmetic number, because the mean of its divisors is an integer number (2069459924).

Almost surely, 2^21245245332 is an apocalyptic number.

It is an amenable number.

21245245332 is an abundant number, since it is smaller than the sum of its proper divisors (28421792844).

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

21245245332 is a wasteful number, since it uses less digits than its factorization.

21245245332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385687 (or 3385685 counting only the distinct ones).

The product of its digits is 57600, while the sum is 33.

Adding to 21245245332 its reverse (23354254212), we get a palindrome (44599499544).

The spelling of 21245245332 in words is "twenty-one billion, two hundred forty-five million, two hundred forty-five thousand, three hundred thirty-two".