20340205237 has 12 divisors (see below), whose sum is σ = 23571351936. Its totient is φ = 17403381440.

The previous prime is 20340205231. The next prime is 20340205241. The reversal of 20340205237 is 73250204302.

It is not a de Polignac number, because 20340205237 - 2³ = 20340205229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340205231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3195973 + ... + 3202330.

It is an arithmetic number, because the mean of its divisors is an integer number (1964279328).

Almost surely, 2^20340205237 is an apocalyptic number.

It is an amenable number.

20340205237 is a deficient number, since it is larger than the sum of its proper divisors (3231146699).

20340205237 is a wasteful number, since it uses less digits than its factorization.

20340205237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398348 (or 6398331 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

Adding to 20340205237 its reverse (73250204302), we get a palindrome (93590409539).

The spelling of 20340205237 in words is "twenty billion, three hundred forty million, two hundred five thousand, two hundred thirty-seven".