20070013 has 8 divisors (see below), whose sum is σ = 21462840. Its totient is φ = 18700800.

The previous prime is 20069999. The next prime is 20070031. The reversal of 20070013 is 31007002.

It can be written as a sum of positive squares in 4 ways, for example, as 17156164 + 2913849 = 4142^2 + 1707^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20070013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20069975 and 20070002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20070913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4128 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (2682855).

Almost surely, 2^20070013 is an apocalyptic number.

It is an amenable number.

20070013 is a deficient number, since it is larger than the sum of its proper divisors (1392827).

20070013 is a wasteful number, since it uses less digits than its factorization.

20070013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 20070013 is about 4479.9568078275. The cubic root of 20070013 is about 271.7581336446.

Adding to 20070013 its reverse (31007002), we get a palindrome (51077015).

The spelling of 20070013 in words is "twenty million, seventy thousand, thirteen".