20484205013 has 4 divisors (see below), whose sum is σ = 21190556940. Its totient is φ = 19777853088.

The previous prime is 20484204991. The next prime is 20484205039. The reversal of 20484205013 is 31050248402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17518640164 + 2965564849 = 132358^2 + 54457^2 .

It is a cyclic number.

It is not a de Polignac number, because 20484205013 - 2¹⁰ = 20484203989 is a prime.

It is a super-2 number, since 2×20484205013² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 706351897 = 20484205013 / (2 + 0 + 4 + 8 + 4 + 2 + 0 + 5 + 0 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20484205043) 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 3 ways as a sum of consecutive naturals, for example, 353175920 + ... + 353175977.

It is an arithmetic number, because the mean of its divisors is an integer number (5297639235).

Almost surely, 2^20484205013 is an apocalyptic number.

It is an amenable number.

20484205013 is a deficient number, since it is larger than the sum of its proper divisors (706351927).

20484205013 is an equidigital number, since it uses as much as digits as its factorization.

20484205013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706351926.

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 20484205013 in words is "twenty billion, four hundred eighty-four million, two hundred five thousand, thirteen".