21304114189 has 2 divisors, whose sum is σ = 21304114190. Its totient is φ = 21304114188.

The previous prime is 21304114163. The next prime is 21304114243. The reversal of 21304114189 is 98141140312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14998166089 + 6305948100 = 122467^2 + 79410^2 .

It is a cyclic number.

It is not a de Polignac number, because 21304114189 - 2¹⁷ = 21303983117 is a prime.

It is a super-2 number, since 2×21304114189² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21304114789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652057094 + 10652057095.

It is an arithmetic number, because the mean of its divisors is an integer number (10652057095).

Almost surely, 2^21304114189 is an apocalyptic number.

It is an amenable number.

21304114189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304114189 is an equidigital number, since it uses as much as digits as its factorization.

21304114189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 21304114189 in words is "twenty-one billion, three hundred four million, one hundred fourteen thousand, one hundred eighty-nine".