20435013 has 12 divisors (see below), whose sum is σ = 31071040. Its totient is φ = 12906216.

The previous prime is 20434991. The next prime is 20435021. The reversal of 20435013 is 31053402.

It is not a de Polignac number, because 20435013 - 2⁹ = 20434501 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 (20435413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59581 + ... + 59922.

Almost surely, 2^20435013 is an apocalyptic number.

It is an amenable number.

20435013 is a deficient number, since it is larger than the sum of its proper divisors (10636027).

20435013 is a wasteful number, since it uses less digits than its factorization.

20435013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119528 (or 119525 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20435013 is about 4520.5102588093. The cubic root of 20435013 is about 273.3956746889.

Adding to 20435013 its reverse (31053402), we get a palindrome (51488415).

It can be divided in two parts, 2043 and 5013, that added together give a square (7056 = 84²).

The spelling of 20435013 in words is "twenty million, four hundred thirty-five thousand, thirteen".