21329977343 has 2 divisors, whose sum is σ = 21329977344. Its totient is φ = 21329977342.

The previous prime is 21329977307. The next prime is 21329977349. The reversal of 21329977343 is 34377992312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21329977343 - 2¹⁴ = 21329960959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21329977291 and 21329977300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21329977349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10664988671 + 10664988672.

It is an arithmetic number, because the mean of its divisors is an integer number (10664988672).

Almost surely, 2^21329977343 is an apocalyptic number.

21329977343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21329977343 is an equidigital number, since it uses as much as digits as its factorization.

21329977343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 50.

The spelling of 21329977343 in words is "twenty-one billion, three hundred twenty-nine million, nine hundred seventy-seven thousand, three hundred forty-three".