21403231163 has 2 divisors, whose sum is σ = 21403231164. Its totient is φ = 21403231162.

The previous prime is 21403231147. The next prime is 21403231193. The reversal of 21403231163 is 36113230412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21403231163 - 2⁴ = 21403231147 is a prime.

It is not a weakly prime, because it can be changed into another prime (21403231193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701615581 + 10701615582.

It is an arithmetic number, because the mean of its divisors is an integer number (10701615582).

Almost surely, 2^21403231163 is an apocalyptic number.

21403231163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403231163 is an equidigital number, since it uses as much as digits as its factorization.

21403231163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21403231163 its reverse (36113230412), we get a palindrome (57516461575).

The spelling of 21403231163 in words is "twenty-one billion, four hundred three million, two hundred thirty-one thousand, one hundred sixty-three".