20074139 has 2 divisors, whose sum is σ = 20074140. Its totient is φ = 20074138.

The previous prime is 20074057. The next prime is 20074141. The reversal of 20074139 is 93147002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20074139 - 2⁸ = 20073883 is a prime.

It is a Sophie Germain prime.

Together with 20074141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20074169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10037069 + 10037070.

It is an arithmetic number, because the mean of its divisors is an integer number (10037070).

Almost surely, 2^20074139 is an apocalyptic number.

20074139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20074139 is an equidigital number, since it uses as much as digits as its factorization.

20074139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20074139 is about 4480.4172796738. The cubic root of 20074139 is about 271.7767550780.

The spelling of 20074139 in words is "twenty million, seventy-four thousand, one hundred thirty-nine".