20037109 has 2 divisors, whose sum is σ = 20037110. Its totient is φ = 20037108.

The previous prime is 20037107. The next prime is 20037179. The reversal of 20037109 is 90173002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19554084 + 483025 = 4422^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 20037109 - 2¹ = 20037107 is a prime.

Together with 20037107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20037109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20037107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10018554 + 10018555.

It is an arithmetic number, because the mean of its divisors is an integer number (10018555).

Almost surely, 2^20037109 is an apocalyptic number.

It is an amenable number.

20037109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20037109 is an equidigital number, since it uses as much as digits as its factorization.

20037109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 20037109 is about 4476.2829445869. The cubic root of 20037109 is about 271.6095401396.

The spelling of 20037109 in words is "twenty million, thirty-seven thousand, one hundred nine".