20143031 has 2 divisors, whose sum is σ = 20143032. Its totient is φ = 20143030.

The previous prime is 20143027. The next prime is 20143033. The reversal of 20143031 is 13034102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20143031 - 2² = 20143027 is a prime.

It is a super-2 number, since 2×20143031² = 811483395733922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20143033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20142997 and 20143015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20143033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071515 + 10071516.

It is an arithmetic number, because the mean of its divisors is an integer number (10071516).

Almost surely, 2^20143031 is an apocalyptic number.

20143031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20143031 is an equidigital number, since it uses as much as digits as its factorization.

20143031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20143031 is about 4488.0988179852. The cubic root of 20143031 is about 272.0873016694.

Adding to 20143031 its reverse (13034102), we get a palindrome (33177133).

The spelling of 20143031 in words is "twenty million, one hundred forty-three thousand, thirty-one".