20502039037 has 2 divisors, whose sum is σ = 20502039038. Its totient is φ = 20502039036.

The previous prime is 20502039029. The next prime is 20502039073. The reversal of 20502039037 is 73093020502.

Together with next prime (20502039073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17740641636 + 2761397401 = 133194^2 + 52549^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502039037 - 2³ = 20502039029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20502039097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251019518 + 10251019519.

It is an arithmetic number, because the mean of its divisors is an integer number (10251019519).

Almost surely, 2^20502039037 is an apocalyptic number.

It is an amenable number.

20502039037 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502039037 is an equidigital number, since it uses as much as digits as its factorization.

20502039037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 31.

Adding to 20502039037 its reverse (73093020502), we get a palindrome (93595059539).

The spelling of 20502039037 in words is "twenty billion, five hundred two million, thirty-nine thousand, thirty-seven".