20293253 has 4 divisors (see below), whose sum is σ = 20302860. Its totient is φ = 20283648.

The previous prime is 20293241. The next prime is 20293289. The reversal of 20293253 is 35239202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35239202 = 2 ⋅17619601.

It can be written as a sum of positive squares in 2 ways, for example, as 12096484 + 8196769 = 3478^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20293253 - 2⁸ = 20292997 is a prime.

It is a super-3 number, since 3×20293253³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20293213) 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, 98 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (5075715).

Almost surely, 2^20293253 is an apocalyptic number.

It is an amenable number.

20293253 is a deficient number, since it is larger than the sum of its proper divisors (9607).

20293253 is an equidigital number, since it uses as much as digits as its factorization.

20293253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9606.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20293253 is about 4504.8033253406. The cubic root of 20293253 is about 272.7620149108.

The spelling of 20293253 in words is "twenty million, two hundred ninety-three thousand, two hundred fifty-three".