21142343039 has 2 divisors, whose sum is σ = 21142343040. Its totient is φ = 21142343038.

The previous prime is 21142342987. The next prime is 21142343041. The reversal of 21142343039 is 93034324112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21142343039 - 2²⁰ = 21141294463 is a prime.

Together with 21142343041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21142342996 and 21142343014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142343059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571171519 + 10571171520.

It is an arithmetic number, because the mean of its divisors is an integer number (10571171520).

Almost surely, 2^21142343039 is an apocalyptic number.

21142343039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142343039 is an equidigital number, since it uses as much as digits as its factorization.

21142343039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 21142343039 in words is "twenty-one billion, one hundred forty-two million, three hundred forty-three thousand, thirty-nine".