20253133231 has 4 divisors (see below), whose sum is σ = 20253492072. Its totient is φ = 20252774392.

The previous prime is 20253133211. The next prime is 20253133247. The reversal of 20253133231 is 13233135202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20253133231 is a prime.

It is a super-2 number, since 2×20253133231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20253133196 and 20253133205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253133211) 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, 74185 + ... + 214498.

It is an arithmetic number, because the mean of its divisors is an integer number (5063373018).

Almost surely, 2^20253133231 is an apocalyptic number.

20253133231 is a deficient number, since it is larger than the sum of its proper divisors (358841).

20253133231 is an equidigital number, since it uses as much as digits as its factorization.

20253133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358840.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 20253133231 its reverse (13233135202), we get a palindrome (33486268433).

The spelling of 20253133231 in words is "twenty billion, two hundred fifty-three million, one hundred thirty-three thousand, two hundred thirty-one".