21246683 has 2 divisors, whose sum is σ = 21246684. Its totient is φ = 21246682.

The previous prime is 21246637. The next prime is 21246689. The reversal of 21246683 is 38664212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21246683 - 2⁶ = 21246619 is a prime.

It is not a weakly prime, because it can be changed into another prime (21246689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623341 + 10623342.

It is an arithmetic number, because the mean of its divisors is an integer number (10623342).

Almost surely, 2^21246683 is an apocalyptic number.

21246683 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246683 is an equidigital number, since it uses as much as digits as its factorization.

21246683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 21246683 is about 4609.4124354412. The cubic root of 21246683 is about 276.9685002867.

The spelling of 21246683 in words is "twenty-one million, two hundred forty-six thousand, six hundred eighty-three".