20013737 has 2 divisors, whose sum is σ = 20013738. Its totient is φ = 20013736.

The previous prime is 20013733. The next prime is 20013739. The reversal of 20013737 is 73731002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13808656 + 6205081 = 3716^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013737 - 2² = 20013733 is a prime.

Together with 20013739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20013731) 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, 10006868 + 10006869.

It is an arithmetic number, because the mean of its divisors is an integer number (10006869).

Almost surely, 2^20013737 is an apocalyptic number.

It is an amenable number.

20013737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013737 is an equidigital number, since it uses as much as digits as its factorization.

20013737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 20013737 is about 4473.6715346570. The cubic root of 20013737 is about 271.5038940278.

Adding to 20013737 its reverse (73731002), we get a palindrome (93744739).

The spelling of 20013737 in words is "twenty million, thirteen thousand, seven hundred thirty-seven".