20782043 has 2 divisors, whose sum is σ = 20782044. Its totient is φ = 20782042.

The previous prime is 20782031. The next prime is 20782051. The reversal of 20782043 is 34028702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20782043 - 2¹⁸ = 20519899 is a prime.

It is a super-2 number, since 2×20782043² = 863786622507698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20782093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10391021 + 10391022.

It is an arithmetic number, because the mean of its divisors is an integer number (10391022).

Almost surely, 2^20782043 is an apocalyptic number.

20782043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20782043 is an equidigital number, since it uses as much as digits as its factorization.

20782043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20782043 is about 4558.7326089605. The cubic root of 20782043 is about 274.9346092457.

The spelling of 20782043 in words is "twenty million, seven hundred eighty-two thousand, forty-three".