20450713253 has 4 divisors (see below), whose sum is σ = 20451028128. Its totient is φ = 20450398380.

The previous prime is 20450713243. The next prime is 20450713267. The reversal of 20450713253 is 35231705402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35231705402 = 2 ⋅17615852701.

It is a cyclic number.

It is not a de Polignac number, because 20450713253 - 2²² = 20446518949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450713243) 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, 20051 + ... + 203232.

It is an arithmetic number, because the mean of its divisors is an integer number (5112757032).

Almost surely, 2^20450713253 is an apocalyptic number.

It is an amenable number.

20450713253 is a deficient number, since it is larger than the sum of its proper divisors (314875).

20450713253 is an equidigital number, since it uses as much as digits as its factorization.

20450713253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314874.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20450713253 in words is "twenty billion, four hundred fifty million, seven hundred thirteen thousand, two hundred fifty-three".