20783066 has 8 divisors (see below), whose sum is σ = 31685844. Its totient is φ = 10221120.

The previous prime is 20783057. The next prime is 20783069. The reversal of 20783066 is 66038702.

It can be written as a sum of positive squares in 2 ways, for example, as 18619225 + 2163841 = 4315^2 + 1471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20783069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85055 + ... + 85298.

Almost surely, 2^20783066 is an apocalyptic number.

20783066 is a deficient number, since it is larger than the sum of its proper divisors (10902778).

20783066 is a wasteful number, since it uses less digits than its factorization.

20783066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170416.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20783066 is about 4558.8448098175. The cubic root of 20783066 is about 274.9391204077.

The spelling of 20783066 in words is "twenty million, seven hundred eighty-three thousand, sixty-six".