20310413 has 4 divisors (see below), whose sum is σ = 20320380. Its totient is φ = 20300448.

The previous prime is 20310401. The next prime is 20310463. The reversal of 20310413 is 31401302.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 7941124 + 12369289 = 2818^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310413 - 2⁴ = 20310397 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 (20310463) 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, 698 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (5080095).

Almost surely, 2^20310413 is an apocalyptic number.

It is an amenable number.

20310413 is a deficient number, since it is larger than the sum of its proper divisors (9967).

20310413 is an equidigital number, since it uses as much as digits as its factorization.

20310413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20310413 is about 4506.7075565206. The cubic root of 20310413 is about 272.8388758834.

Adding to 20310413 its reverse (31401302), we get a palindrome (51711715).

The spelling of 20310413 in words is "twenty million, three hundred ten thousand, four hundred thirteen".