21079363 has 2 divisors, whose sum is σ = 21079364. Its totient is φ = 21079362.

The previous prime is 21079327. The next prime is 21079369. The reversal of 21079363 is 36397012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21079363 - 2⁹ = 21078851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21079369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10539681 + 10539682.

It is an arithmetic number, because the mean of its divisors is an integer number (10539682).

Almost surely, 2^21079363 is an apocalyptic number.

21079363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21079363 is an equidigital number, since it uses as much as digits as its factorization.

21079363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 21079363 is about 4591.2267423860. The cubic root of 21079363 is about 276.2395307349.

The spelling of 21079363 in words is "twenty-one million, seventy-nine thousand, three hundred sixty-three".