20253253 has 4 divisors (see below), whose sum is σ = 20318688. Its totient is φ = 20187820.

The previous prime is 20253241. The next prime is 20253347. The reversal of 20253253 is 35235202.

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 20253253 - 2¹³ = 20245061 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253353) 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, 32251 + ... + 32872.

It is an arithmetic number, because the mean of its divisors is an integer number (5079672).

Almost surely, 2^20253253 is an apocalyptic number.

It is an amenable number.

20253253 is a deficient number, since it is larger than the sum of its proper divisors (65435).

20253253 is an equidigital number, since it uses as much as digits as its factorization.

20253253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65434.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 20253253 is about 4500.3614299298. The cubic root of 20253253 is about 272.5826834354.

Adding to 20253253 its reverse (35235202), we get a palindrome (55488455).

The spelling of 20253253 in words is "twenty million, two hundred fifty-three thousand, two hundred fifty-three".