20783089 has 2 divisors, whose sum is σ = 20783090. Its totient is φ = 20783088.

The previous prime is 20783069. The next prime is 20783137. The reversal of 20783089 is 98038702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 3268864 = 4185^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 20783089 - 2⁵ = 20783057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20783039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10391544 + 10391545.

It is an arithmetic number, because the mean of its divisors is an integer number (10391545).

Almost surely, 2^20783089 is an apocalyptic number.

It is an amenable number.

20783089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20783089 is an equidigital number, since it uses as much as digits as its factorization.

20783089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20783089 is about 4558.8473323857. The cubic root of 20783089 is about 274.9392218300.

The spelling of 20783089 in words is "twenty million, seven hundred eighty-three thousand, eighty-nine".