20020513 has 12 divisors (see below), whose sum is σ = 21019824. Its totient is φ = 19065000.

The previous prime is 20020501. The next prime is 20020531. The reversal of 20020513 is 31502002.

It is not a de Polignac number, because 20020513 - 2⁹ = 20020001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020493 and 20020502.

It is not an unprimeable number, because it can be changed into a prime (20023513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79638 + ... + 79888.

It is an arithmetic number, because the mean of its divisors is an integer number (1751652).

Almost surely, 2^20020513 is an apocalyptic number.

It is an amenable number.

20020513 is a deficient number, since it is larger than the sum of its proper divisors (999311).

20020513 is an equidigital number, since it uses as much as digits as its factorization.

20020513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20020513 is about 4474.4287903597. The cubic root of 20020513 is about 271.5345313646.

Adding to 20020513 its reverse (31502002), we get a palindrome (51522515).

The spelling of 20020513 in words is "twenty million, twenty thousand, five hundred thirteen".