20501413 has 4 divisors (see below), whose sum is σ = 20558880. Its totient is φ = 20443948.

The previous prime is 20501389. The next prime is 20501419. The reversal of 20501413 is 31410502.

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 20501413 - 2⁵ = 20501381 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 (20501419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28195 + ... + 28912.

It is an arithmetic number, because the mean of its divisors is an integer number (5139720).

Almost surely, 2^20501413 is an apocalyptic number.

It is an amenable number.

20501413 is a deficient number, since it is larger than the sum of its proper divisors (57467).

20501413 is an equidigital number, since it uses as much as digits as its factorization.

20501413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57466.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20501413 is about 4527.8486061263. The cubic root of 20501413 is about 273.6914716794.

Adding to 20501413 its reverse (31410502), we get a palindrome (51911915).

The spelling of 20501413 in words is "twenty million, five hundred one thousand, four hundred thirteen".