20003505413 has 8 divisors (see below), whose sum is σ = 21227362200. Its totient is φ = 18784890880.

The previous prime is 20003505331. The next prime is 20003505451. The reversal of 20003505413 is 31450530002.

It can be written as a sum of positive squares in 4 ways, for example, as 11972298724 + 8031206689 = 109418^2 + 89617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20003505413 - 2²⁶ = 19936396549 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 (20003505113) 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 7 ways as a sum of consecutive naturals, for example, 1302698 + ... + 1317963.

It is an arithmetic number, because the mean of its divisors is an integer number (2653420275).

Almost surely, 2^20003505413 is an apocalyptic number.

It is an amenable number.

20003505413 is a deficient number, since it is larger than the sum of its proper divisors (1223856787).

20003505413 is a wasteful number, since it uses less digits than its factorization.

20003505413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621127.

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

The spelling of 20003505413 in words is "twenty billion, three million, five hundred five thousand, four hundred thirteen".