21320304302 has 24 divisors (see below), whose sum is σ = 36009456336. Its totient is φ = 9454676000.

The previous prime is 21320304293. The next prime is 21320304307. The reversal of 21320304302 is 20340302312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320304307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064474 + ... + 1084317.

It is an arithmetic number, because the mean of its divisors is an integer number (1500394014).

Almost surely, 2^21320304302 is an apocalyptic number.

21320304302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21320304302 is a deficient number, since it is larger than the sum of its proper divisors (14689152034).

21320304302 is a wasteful number, since it uses less digits than its factorization.

21320304302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148856 (or 2148845 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21320304302 its reverse (20340302312), we get a palindrome (41660606614).

The spelling of 21320304302 in words is "twenty-one billion, three hundred twenty million, three hundred four thousand, three hundred two".