21320247302 has 8 divisors (see below), whose sum is σ = 33370821936. Its totient is φ = 10196639992.

The previous prime is 21320247259. The next prime is 21320247307. The reversal of 21320247302 is 20374202312.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320247307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231741773 + ... + 231741864.

It is an arithmetic number, because the mean of its divisors is an integer number (4171352742).

Almost surely, 2^21320247302 is an apocalyptic number.

21320247302 is a deficient number, since it is larger than the sum of its proper divisors (12050574634).

21320247302 is a wasteful number, since it uses less digits than its factorization.

21320247302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463483662.

The product of its (nonzero) digits is 4032, while the sum is 26.

Adding to 21320247302 its reverse (20374202312), we get a palindrome (41694449614).

The spelling of 21320247302 in words is "twenty-one billion, three hundred twenty million, two hundred forty-seven thousand, three hundred two".