20012939 has 2 divisors, whose sum is σ = 20012940. Its totient is φ = 20012938.

The previous prime is 20012933. The next prime is 20012963. The reversal of 20012939 is 93921002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012939 - 2⁸ = 20012683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20012933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006469 + 10006470.

It is an arithmetic number, because the mean of its divisors is an integer number (10006470).

Almost surely, 2^20012939 is an apocalyptic number.

20012939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012939 is an equidigital number, since it uses as much as digits as its factorization.

20012939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20012939 is about 4473.5823452799. The cubic root of 20012939 is about 271.5002854565.

The spelling of 20012939 in words is "twenty million, twelve thousand, nine hundred thirty-nine".