21241436239 has 2 divisors, whose sum is σ = 21241436240. Its totient is φ = 21241436238.

The previous prime is 21241436221. The next prime is 21241436257. The reversal of 21241436239 is 93263414212.

It is a balanced prime because it is at equal distance from previous prime (21241436221) and next prime (21241436257).

It is a cyclic number.

It is not a de Polignac number, because 21241436239 - 2⁵ = 21241436207 is a prime.

It is a super-2 number, since 2×21241436239² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21241436198 and 21241436207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241436219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620718119 + 10620718120.

It is an arithmetic number, because the mean of its divisors is an integer number (10620718120).

Almost surely, 2^21241436239 is an apocalyptic number.

21241436239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241436239 is an equidigital number, since it uses as much as digits as its factorization.

21241436239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The spelling of 21241436239 in words is "twenty-one billion, two hundred forty-one million, four hundred thirty-six thousand, two hundred thirty-nine".