20253313 has 4 divisors (see below), whose sum is σ = 20366640. Its totient is φ = 20139988.

The previous prime is 20253241. The next prime is 20253347. The reversal of 20253313 is 31335202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31335202 = 2 ⋅15667601.

It is a cyclic number.

It is not a de Polignac number, because 20253313 - 2¹⁷ = 20122241 is a prime.

It is a Duffinian 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, 56395 + ... + 56752.

It is an arithmetic number, because the mean of its divisors is an integer number (5091660).

Almost surely, 2^20253313 is an apocalyptic number.

It is an amenable number.

20253313 is a deficient number, since it is larger than the sum of its proper divisors (113327).

20253313 is a wasteful number, since it uses less digits than its factorization.

20253313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113326.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20253313 is about 4500.3680960561. The cubic root of 20253313 is about 272.5829526094.

Adding to 20253313 its reverse (31335202), we get a palindrome (51588515).

The spelling of 20253313 in words is "twenty million, two hundred fifty-three thousand, three hundred thirteen".