20413313 has 4 divisors (see below), whose sum is σ = 20425728. Its totient is φ = 20400900.

The previous prime is 20413291. The next prime is 20413331. The reversal of 20413313 is 31331402.

It is a happy number.

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: 31331402 = 2 ⋅15665701.

It is a cyclic number.

It is not a de Polignac number, because 20413313 - 2¹² = 20409217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413291 and 20413300.

It is not an unprimeable number, because it can be changed into a prime (20415313) 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, 3281 + ... + 7182.

It is an arithmetic number, because the mean of its divisors is an integer number (5106432).

Almost surely, 2^20413313 is an apocalyptic number.

It is an amenable number.

20413313 is a deficient number, since it is larger than the sum of its proper divisors (12415).

20413313 is a wasteful number, since it uses less digits than its factorization.

20413313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12414.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20413313 is about 4518.1094497588. The cubic root of 20413313 is about 273.2988671923.

Adding to 20413313 its reverse (31331402), we get a palindrome (51744715).

The spelling of 20413313 in words is "twenty million, four hundred thirteen thousand, three hundred thirteen".