21352251302 has 4 divisors (see below), whose sum is σ = 32028376956. Its totient is φ = 10676125650.

The previous prime is 21352251253. The next prime is 21352251307. The reversal of 21352251302 is 20315225312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352251307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5338062824 + ... + 5338062827.

It is an arithmetic number, because the mean of its divisors is an integer number (8007094239).

Almost surely, 2^21352251302 is an apocalyptic number.

21352251302 is a deficient number, since it is larger than the sum of its proper divisors (10676125654).

21352251302 is a wasteful number, since it uses less digits than its factorization.

21352251302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10676125653.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 21352251302 its reverse (20315225312), we get a palindrome (41667476614).

The spelling of 21352251302 in words is "twenty-one billion, three hundred fifty-two million, two hundred fifty-one thousand, three hundred two".