21304223147 has 2 divisors, whose sum is σ = 21304223148. Its totient is φ = 21304223146.

The previous prime is 21304223141. The next prime is 21304223153. The reversal of 21304223147 is 74132240312.

It is a balanced prime because it is at equal distance from previous prime (21304223141) and next prime (21304223153).

It is a cyclic number.

It is not a de Polignac number, because 21304223147 - 2⁴ = 21304223131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21304223141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652111573 + 10652111574.

It is an arithmetic number, because the mean of its divisors is an integer number (10652111574).

Almost surely, 2^21304223147 is an apocalyptic number.

21304223147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304223147 is an equidigital number, since it uses as much as digits as its factorization.

21304223147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 21304223147 its reverse (74132240312), we get a palindrome (95436463459).

The spelling of 21304223147 in words is "twenty-one billion, three hundred four million, two hundred twenty-three thousand, one hundred forty-seven".