20143807 has 2 divisors, whose sum is σ = 20143808. Its totient is φ = 20143806.

The previous prime is 20143801. The next prime is 20143811. The reversal of 20143807 is 70834102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20143807 - 2⁷ = 20143679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20143801) 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, 10071903 + 10071904.

It is an arithmetic number, because the mean of its divisors is an integer number (10071904).

Almost surely, 2^20143807 is an apocalyptic number.

20143807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20143807 is an equidigital number, since it uses as much as digits as its factorization.

20143807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20143807 is about 4488.1852680120. The cubic root of 20143807 is about 272.0907956327.

Adding to 20143807 its reverse (70834102), we get a palindrome (90977909).

The spelling of 20143807 in words is "twenty million, one hundred forty-three thousand, eight hundred seven".