21002301839 has 2 divisors, whose sum is σ = 21002301840. Its totient is φ = 21002301838.

The previous prime is 21002301799. The next prime is 21002301841. The reversal of 21002301839 is 93810320012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002301839 - 2⁸ = 21002301583 is a prime.

Together with 21002301841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002301869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501150919 + 10501150920.

It is an arithmetic number, because the mean of its divisors is an integer number (10501150920).

Almost surely, 2^21002301839 is an apocalyptic number.

21002301839 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002301839 is an equidigital number, since it uses as much as digits as its factorization.

21002301839 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 29.

The spelling of 21002301839 in words is "twenty-one billion, two million, three hundred one thousand, eight hundred thirty-nine".