20340937 has 2 divisors, whose sum is σ = 20340938. Its totient is φ = 20340936.

The previous prime is 20340913. The next prime is 20341007. The reversal of 20340937 is 73904302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19219456 + 1121481 = 4384^2 + 1059^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340937 - 2¹⁹ = 19816649 is a prime.

It is equal to p_1290826 and since 20340937 and 1290826 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20340907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170468 + 10170469.

It is an arithmetic number, because the mean of its divisors is an integer number (10170469).

Almost surely, 2^20340937 is an apocalyptic number.

It is an amenable number.

20340937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340937 is an equidigital number, since it uses as much as digits as its factorization.

20340937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20340937 is about 4510.0927928370. The cubic root of 20340937 is about 272.9754883242.

The spelling of 20340937 in words is "twenty million, three hundred forty thousand, nine hundred thirty-seven".