20723683 has 2 divisors, whose sum is σ = 20723684. Its totient is φ = 20723682.

The previous prime is 20723671. The next prime is 20723707. The reversal of 20723683 is 38632702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20723683 is a prime.

It is not a weakly prime, because it can be changed into another prime (20723083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10361841 + 10361842.

It is an arithmetic number, because the mean of its divisors is an integer number (10361842).

Almost surely, 2^20723683 is an apocalyptic number.

20723683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20723683 is an equidigital number, since it uses as much as digits as its factorization.

20723683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20723683 is about 4552.3272070448. The cubic root of 20723683 is about 274.6770114308.

The spelling of 20723683 in words is "twenty million, seven hundred twenty-three thousand, six hundred eighty-three".