20782066 has 8 divisors (see below), whose sum is σ = 31238064. Its totient is φ = 10369380.

The previous prime is 20782061. The next prime is 20782081. The reversal of 20782066 is 66028702.

It is a happy number.

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 (20782061) 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, 9600 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (3904758).

Almost surely, 2^20782066 is an apocalyptic number.

20782066 is a deficient number, since it is larger than the sum of its proper divisors (10455998).

20782066 is a wasteful number, since it uses less digits than its factorization.

20782066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21656.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20782066 is about 4558.7351315908. The cubic root of 20782066 is about 274.9347106713.

The spelling of 20782066 in words is "twenty million, seven hundred eighty-two thousand, sixty-six".