20003513213 has 4 divisors (see below), whose sum is σ = 20147423520. Its totient is φ = 19859602908.

The previous prime is 20003513209. The next prime is 20003513221. The reversal of 20003513213 is 31231530002.

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 20003513213 - 2² = 20003513209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003513263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71954945 + ... + 71955222.

It is an arithmetic number, because the mean of its divisors is an integer number (5036855880).

Almost surely, 2^20003513213 is an apocalyptic number.

It is an amenable number.

20003513213 is a deficient number, since it is larger than the sum of its proper divisors (143910307).

20003513213 is a wasteful number, since it uses less digits than its factorization.

20003513213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143910306.

The product of its (nonzero) digits is 540, while the sum is 20.

The spelling of 20003513213 in words is "twenty billion, three million, five hundred thirteen thousand, two hundred thirteen".