20703031 has 2 divisors, whose sum is σ = 20703032. Its totient is φ = 20703030.

The previous prime is 20702993. The next prime is 20703079. The reversal of 20703031 is 13030702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20703031 - 2⁹ = 20702519 is a prime.

It is a super-2 number, since 2×20703031² = 857230985173922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20702996 and 20703014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20703131) 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, 10351515 + 10351516.

It is an arithmetic number, because the mean of its divisors is an integer number (10351516).

Almost surely, 2^20703031 is an apocalyptic number.

20703031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20703031 is an equidigital number, since it uses as much as digits as its factorization.

20703031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 20703031 is about 4550.0583512742. The cubic root of 20703031 is about 274.5857388029.

Adding to 20703031 its reverse (13030702), we get a palindrome (33733733).

The spelling of 20703031 in words is "twenty million, seven hundred three thousand, thirty-one".