20045413 has 4 divisors (see below), whose sum is σ = 20287008. Its totient is φ = 19803820.

The previous prime is 20045411. The next prime is 20045419. The reversal of 20045413 is 31454002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20045413 - 2¹ = 20045411 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 (20045411) 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, 120673 + ... + 120838.

It is an arithmetic number, because the mean of its divisors is an integer number (5071752).

Almost surely, 2^20045413 is an apocalyptic number.

It is an amenable number.

20045413 is a deficient number, since it is larger than the sum of its proper divisors (241595).

20045413 is an equidigital number, since it uses as much as digits as its factorization.

20045413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241594.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20045413 is about 4477.2104038117. The cubic root of 20045413 is about 271.6470560992.

Adding to 20045413 its reverse (31454002), we get a palindrome (51499415).

The spelling of 20045413 in words is "twenty million, forty-five thousand, four hundred thirteen".