20320481237 has 8 divisors (see below), whose sum is σ = 23225070336. Its totient is φ = 17416307952.

The previous prime is 20320481189. The next prime is 20320481243. The reversal of 20320481237 is 73218402302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320481237 - 2¹² = 20320477141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320483237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8948 + ... + 201794.

It is an arithmetic number, because the mean of its divisors is an integer number (2903133792).

Almost surely, 2^20320481237 is an apocalyptic number.

It is an amenable number.

20320481237 is a deficient number, since it is larger than the sum of its proper divisors (2904589099).

20320481237 is a wasteful number, since it uses less digits than its factorization.

20320481237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207907.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 20320481237 its reverse (73218402302), we get a palindrome (93538883539).

The spelling of 20320481237 in words is "twenty billion, three hundred twenty million, four hundred eighty-one thousand, two hundred thirty-seven".