20343413 has 4 divisors (see below), whose sum is σ = 21044940. Its totient is φ = 19641888.

The previous prime is 20343403. The next prime is 20343419. The reversal of 20343413 is 31434302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31434302 = 2 ⋅15717151.

It can be written as a sum of positive squares in 2 ways, for example, as 16630084 + 3713329 = 4078^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343413 - 2⁴ = 20343397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343419) 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, 350720 + ... + 350777.

It is an arithmetic number, because the mean of its divisors is an integer number (5261235).

Almost surely, 2^20343413 is an apocalyptic number.

It is an amenable number.

20343413 is a deficient number, since it is larger than the sum of its proper divisors (701527).

20343413 is an equidigital number, since it uses as much as digits as its factorization.

20343413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701526.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20343413 is about 4510.3672799452. The cubic root of 20343413 is about 272.9865638528.

Adding to 20343413 its reverse (31434302), we get a palindrome (51777715).

The spelling of 20343413 in words is "twenty million, three hundred forty-three thousand, four hundred thirteen".