20343031 has 2 divisors, whose sum is σ = 20343032. Its totient is φ = 20343030.

The previous prime is 20343019. The next prime is 20343049. The reversal of 20343031 is 13034302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20343031 is a prime.

It is a super-2 number, since 2×20343031² = 827677820533922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20342996 and 20343014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20343061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171515 + 10171516.

It is an arithmetic number, because the mean of its divisors is an integer number (10171516).

Almost surely, 2^20343031 is an apocalyptic number.

20343031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343031 is an equidigital number, since it uses as much as digits as its factorization.

20343031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20343031 is about 4510.3249328624. The cubic root of 20343031 is about 272.9848551667.

Adding to 20343031 its reverse (13034302), we get a palindrome (33377333).

It can be divided in two parts, 203 and 43031, that added together give a palindrome (43234).

The spelling of 20343031 in words is "twenty million, three hundred forty-three thousand, thirty-one".