20137206253 has 2 divisors, whose sum is σ = 20137206254. Its totient is φ = 20137206252.

The previous prime is 20137206251. The next prime is 20137206263. The reversal of 20137206253 is 35260273102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19610641444 + 526564809 = 140038^2 + 22947^2 .

It is a cyclic number.

It is not a de Polignac number, because 20137206253 - 2¹ = 20137206251 is a prime.

Together with 20137206251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20137206251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068603126 + 10068603127.

It is an arithmetic number, because the mean of its divisors is an integer number (10068603127).

Almost surely, 2^20137206253 is an apocalyptic number.

It is an amenable number.

20137206253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20137206253 is an equidigital number, since it uses as much as digits as its factorization.

20137206253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

Adding to 20137206253 its reverse (35260273102), we get a palindrome (55397479355).

The spelling of 20137206253 in words is "twenty billion, one hundred thirty-seven million, two hundred six thousand, two hundred fifty-three".