20001012013 has 4 divisors (see below), whose sum is σ = 20120778720. Its totient is φ = 19881245308.

The previous prime is 20001011969. The next prime is 20001012019. The reversal of 20001012013 is 31021010002.

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 20001012013 - 2¹³ = 20001003821 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 (20001012019) 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, 59883103 + ... + 59883436.

It is an arithmetic number, because the mean of its divisors is an integer number (5030194680).

Almost surely, 2^20001012013 is an apocalyptic number.

It is an amenable number.

20001012013 is a deficient number, since it is larger than the sum of its proper divisors (119766707).

20001012013 is a wasteful number, since it uses less digits than its factorization.

20001012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119766706.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20001012013 its reverse (31021010002), we get a palindrome (51022022015).

The spelling of 20001012013 in words is "twenty billion, one million, twelve thousand, thirteen".