20202253 has 4 divisors (see below), whose sum is σ = 20381148. Its totient is φ = 20023360.

The previous prime is 20202251. The next prime is 20202311. The reversal of 20202253 is 35220202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 956484 + 19245769 = 978^2 + 4387^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202253 - 2¹ = 20202251 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 (20202251) 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, 89278 + ... + 89503.

It is an arithmetic number, because the mean of its divisors is an integer number (5095287).

Almost surely, 2^20202253 is an apocalyptic number.

It is an amenable number.

20202253 is a deficient number, since it is larger than the sum of its proper divisors (178895).

20202253 is a wasteful number, since it uses less digits than its factorization.

20202253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178894.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20202253 is about 4494.6916468207. The cubic root of 20202253 is about 272.3536930290.

Adding to 20202253 its reverse (35220202), we get a palindrome (55422455).

The spelling of 20202253 in words is "twenty million, two hundred two thousand, two hundred fifty-three".