20983727 has 2 divisors, whose sum is σ = 20983728. Its totient is φ = 20983726.

The previous prime is 20983723. The next prime is 20983741. The reversal of 20983727 is 72738902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20983727 - 2² = 20983723 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20983723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10491863 + 10491864.

It is an arithmetic number, because the mean of its divisors is an integer number (10491864).

Almost surely, 2^20983727 is an apocalyptic number.

20983727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20983727 is an equidigital number, since it uses as much as digits as its factorization.

20983727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 20983727 is about 4580.7998209920. The cubic root of 20983727 is about 275.8211357733.

The spelling of 20983727 in words is "twenty million, nine hundred eighty-three thousand, seven hundred twenty-seven".