20502341437 has 2 divisors, whose sum is σ = 20502341438. Its totient is φ = 20502341436.

The previous prime is 20502341423. The next prime is 20502341449. The reversal of 20502341437 is 73414320502.

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., 19917959161 + 584382276 = 141131^2 + 24174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20502341437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20502341399 and 20502341408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20502341407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251170718 + 10251170719.

It is an arithmetic number, because the mean of its divisors is an integer number (10251170719).

Almost surely, 2^20502341437 is an apocalyptic number.

It is an amenable number.

20502341437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502341437 is an equidigital number, since it uses as much as digits as its factorization.

20502341437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20502341437 its reverse (73414320502), we get a palindrome (93916661939).

The spelling of 20502341437 in words is "twenty billion, five hundred two million, three hundred forty-one thousand, four hundred thirty-seven".