20130132331237 has 2 divisors, whose sum is σ = 20130132331238. Its totient is φ = 20130132331236.

The previous prime is 20130132331217. The next prime is 20130132331241. The reversal of 20130132331237 is 73213323103102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19834276837761 + 295855493476 = 4453569^2 + 543926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130132331237 is a prime.

It is a super-2 number, since 2×20130132331237² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20130132331199 and 20130132331208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20130132331207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065066165618 + 10065066165619.

It is an arithmetic number, because the mean of its divisors is an integer number (10065066165619).

Almost surely, 2^{20130132331237} is an apocalyptic number.

It is an amenable number.

20130132331237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130132331237 is an equidigital number, since it uses as much as digits as its factorization.

20130132331237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 31.

Adding to 20130132331237 its reverse (73213323103102), we get a palindrome (93343455434339).

The spelling of 20130132331237 in words is "twenty trillion, one hundred thirty billion, one hundred thirty-two million, three hundred thirty-one thousand, two hundred thirty-seven".