20413535 has 16 divisors (see below), whose sum is σ = 26447040. Its totient is φ = 15079680.

The previous prime is 20413511. The next prime is 20413537. The reversal of 20413535 is 53531402.

It is not a de Polignac number, because 20413535 - 2⁸ = 20413279 is a prime.

It is a super-2 number, since 2×20413535² = 833424822392450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20413535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (1652940).

Almost surely, 2^20413535 is an apocalyptic number.

20413535 is a deficient number, since it is larger than the sum of its proper divisors (6033505).

20413535 is a wasteful number, since it uses less digits than its factorization.

20413535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20413535 is about 4518.1340174900. The cubic root of 20413535 is about 273.2998579204.

Adding to 20413535 its reverse (53531402), we get a palindrome (73944937).

The spelling of 20413535 in words is "twenty million, four hundred thirteen thousand, five hundred thirty-five".