20142047 has 2 divisors, whose sum is σ = 20142048. Its totient is φ = 20142046.

The previous prime is 20142019. The next prime is 20142049. The reversal of 20142047 is 74024102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20142047 - 2¹² = 20137951 is a prime.

Together with 20142049, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20142049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071023 + 10071024.

It is an arithmetic number, because the mean of its divisors is an integer number (10071024).

Almost surely, 2^20142047 is an apocalyptic number.

20142047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20142047 is an equidigital number, since it uses as much as digits as its factorization.

20142047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20142047 is about 4487.9891933916. The cubic root of 20142047 is about 272.0828710508.

Adding to 20142047 its reverse (74024102), we get a palindrome (94166149).

The spelling of 20142047 in words is "twenty million, one hundred forty-two thousand, forty-seven".