20453413 has 4 divisors (see below), whose sum is σ = 20888640. Its totient is φ = 20018188.

The previous prime is 20453401. The next prime is 20453437. The reversal of 20453413 is 31435402.

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: 31435402 = 2 ⋅15717701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20453413 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 (20453453) 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, 217543 + ... + 217636.

It is an arithmetic number, because the mean of its divisors is an integer number (5222160).

Almost surely, 2^20453413 is an apocalyptic number.

It is an amenable number.

20453413 is a deficient number, since it is larger than the sum of its proper divisors (435227).

20453413 is an equidigital number, since it uses as much as digits as its factorization.

20453413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435226.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20453413 is about 4522.5449693729. The cubic root of 20453413 is about 273.4777066297.

Adding to 20453413 its reverse (31435402), we get a palindrome (51888815).

The spelling of 20453413 in words is "twenty million, four hundred fifty-three thousand, four hundred thirteen".