21203082239 has 2 divisors, whose sum is σ = 21203082240. Its totient is φ = 21203082238.

The previous prime is 21203082233. The next prime is 21203082247. The reversal of 21203082239 is 93228030212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21203082239 - 2⁸ = 21203081983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203082233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601541119 + 10601541120.

It is an arithmetic number, because the mean of its divisors is an integer number (10601541120).

Almost surely, 2^21203082239 is an apocalyptic number.

21203082239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203082239 is an equidigital number, since it uses as much as digits as its factorization.

21203082239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 21203082239 in words is "twenty-one billion, two hundred three million, eighty-two thousand, two hundred thirty-nine".