20010002013 has 6 divisors (see below), whose sum is σ = 28903336254. Its totient is φ = 13340001336.

The previous prime is 20010002009. The next prime is 20010002027. The reversal of 20010002013 is 31020001002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18989391204 + 1020610809 = 137802^2 + 31947^2 .

It is not a de Polignac number, because 20010002013 - 2² = 20010002009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2223333557 = 20010002013 / (2 + 0 + 0 + 1 + 0 + 0 + 0 + 2 + 0 + 1 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 20010001986 and 20010002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010002113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111666770 + ... + 1111666787.

It is an arithmetic number, because the mean of its divisors is an integer number (4817222709).

Almost surely, 2^20010002013 is an apocalyptic number.

It is an amenable number.

20010002013 is a deficient number, since it is larger than the sum of its proper divisors (8893334241).

20010002013 is a wasteful number, since it uses less digits than its factorization.

20010002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223333563 (or 2223333560 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20010002013 its reverse (31020001002), we get a palindrome (51030003015).

The spelling of 20010002013 in words is "twenty billion, ten million, two thousand, thirteen".