20116637 has 2 divisors, whose sum is σ = 20116638. Its totient is φ = 20116636.

The previous prime is 20116619. The next prime is 20116667. The reversal of 20116637 is 73661102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 7873636 = 3499^2 + 2806^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116637 - 2⁸ = 20116381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20116667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058318 + 10058319.

It is an arithmetic number, because the mean of its divisors is an integer number (10058319).

Almost surely, 2^20116637 is an apocalyptic number.

It is an amenable number.

20116637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116637 is an equidigital number, since it uses as much as digits as its factorization.

20116637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20116637 is about 4485.1574108386. The cubic root of 20116637 is about 271.9684084200.

Adding to 20116637 its reverse (73661102), we get a palindrome (93777739).

The spelling of 20116637 in words is "twenty million, one hundred sixteen thousand, six hundred thirty-seven".