20800253 has 4 divisors (see below), whose sum is σ = 21362460. Its totient is φ = 20238048.

The previous prime is 20800229. The next prime is 20800277. The reversal of 20800253 is 35200802.

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

It is an interprime number because it is at equal distance from previous prime (20800229) and next prime (20800277).

It can be written as a sum of positive squares in 2 ways, for example, as 16297369 + 4502884 = 4037^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 20800253 - 2¹⁶ = 20734717 is a prime.

It is a super-3 number, since 3×20800253³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800553) 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, 281048 + ... + 281121.

It is an arithmetic number, because the mean of its divisors is an integer number (5340615).

Almost surely, 2^20800253 is an apocalyptic number.

It is an amenable number.

20800253 is a deficient number, since it is larger than the sum of its proper divisors (562207).

20800253 is an equidigital number, since it uses as much as digits as its factorization.

20800253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562206.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20800253 is about 4560.7294372721. The cubic root of 20800253 is about 275.0148884501.

The spelling of 20800253 in words is "twenty million, eight hundred thousand, two hundred fifty-three".