20310253253 has 4 divisors (see below), whose sum is σ = 20782584768. Its totient is φ = 19837921740.

The previous prime is 20310253241. The next prime is 20310253259. The reversal of 20310253253 is 35235201302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20310253253 - 2²⁴ = 20293476037 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 (20310253259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236165693 + ... + 236165778.

It is an arithmetic number, because the mean of its divisors is an integer number (5195646192).

Almost surely, 2^20310253253 is an apocalyptic number.

It is an amenable number.

20310253253 is a deficient number, since it is larger than the sum of its proper divisors (472331515).

20310253253 is an equidigital number, since it uses as much as digits as its factorization.

20310253253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472331514.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20310253253 its reverse (35235201302), we get a palindrome (55545454555).

The spelling of 20310253253 in words is "twenty billion, three hundred ten million, two hundred fifty-three thousand, two hundred fifty-three".