21692758152839 has 2 divisors, whose sum is σ = 21692758152840. Its totient is φ = 21692758152838.

The previous prime is 21692758152809. The next prime is 21692758152913. The reversal of 21692758152839 is 93825185729612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21692758152839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21692758152809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10846379076419 + 10846379076420.

It is an arithmetic number, because the mean of its divisors is an integer number (10846379076420).

Almost surely, 2^{21692758152839} is an apocalyptic number.

21692758152839 is a deficient number, since it is larger than the sum of its proper divisors (1).

21692758152839 is an equidigital number, since it uses as much as digits as its factorization.

21692758152839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130636800, while the sum is 68.

The spelling of 21692758152839 in words is "twenty-one trillion, six hundred ninety-two billion, seven hundred fifty-eight million, one hundred fifty-two thousand, eight hundred thirty-nine".