21842522839 has 2 divisors, whose sum is σ = 21842522840. Its totient is φ = 21842522838.

The previous prime is 21842522833. The next prime is 21842522899. The reversal of 21842522839 is 93822524812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21842522839 - 2³ = 21842522831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21842522831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10921261419 + 10921261420.

It is an arithmetic number, because the mean of its divisors is an integer number (10921261420).

Almost surely, 2^21842522839 is an apocalyptic number.

21842522839 is a deficient number, since it is larger than the sum of its proper divisors (1).

21842522839 is an equidigital number, since it uses as much as digits as its factorization.

21842522839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The spelling of 21842522839 in words is "twenty-one billion, eight hundred forty-two million, five hundred twenty-two thousand, eight hundred thirty-nine".