20641039 has 2 divisors, whose sum is σ = 20641040. Its totient is φ = 20641038.

The previous prime is 20641013. The next prime is 20641057. The reversal of 20641039 is 93014602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20641039 - 2⁵ = 20641007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20641099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320519 + 10320520.

It is an arithmetic number, because the mean of its divisors is an integer number (10320520).

Almost surely, 2^20641039 is an apocalyptic number.

20641039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641039 is an equidigital number, since it uses as much as digits as its factorization.

20641039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20641039 is about 4543.2410237627. The cubic root of 20641039 is about 274.3113967276.

The spelling of 20641039 in words is "twenty million, six hundred forty-one thousand, thirty-nine".