20040034237 has 2 divisors, whose sum is σ = 20040034238. Its totient is φ = 20040034236.

The previous prime is 20040034219. The next prime is 20040034279. The reversal of 20040034237 is 73243004002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15175529721 + 4864504516 = 123189^2 + 69746^2 .

It is a cyclic number.

It is not a de Polignac number, because 20040034237 - 2¹⁵ = 20040001469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20040034337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020017118 + 10020017119.

It is an arithmetic number, because the mean of its divisors is an integer number (10020017119).

Almost surely, 2^20040034237 is an apocalyptic number.

It is an amenable number.

20040034237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040034237 is an equidigital number, since it uses as much as digits as its factorization.

20040034237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 25.

Adding to 20040034237 its reverse (73243004002), we get a palindrome (93283038239).

The spelling of 20040034237 in words is "twenty billion, forty million, thirty-four thousand, two hundred thirty-seven".