20020013 has 8 divisors (see below), whose sum is σ = 22086456. Its totient is φ = 18028800.

The previous prime is 20020001. The next prime is 20020019. The reversal of 20020013 is 31002002.

It can be written as a sum of positive squares in 4 ways, for example, as 2067844 + 17952169 = 1438^2 + 4237^2 .

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 20020013 - 2⁶ = 20019949 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 (20020019) 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, 18248 + ... + 19313.

It is an arithmetic number, because the mean of its divisors is an integer number (2760807).

Almost surely, 2^20020013 is an apocalyptic number.

It is an amenable number.

20020013 is a deficient number, since it is larger than the sum of its proper divisors (2066443).

20020013 is a wasteful number, since it uses less digits than its factorization.

20020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37615.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 20020013 is about 4474.3729169572. The cubic root of 20020013 is about 271.5322708765.

Adding to 20020013 its reverse (31002002), we get a palindrome (51022015).

The spelling of 20020013 in words is "twenty million, twenty thousand, thirteen".