20010516 has 12 divisors (see below), whose sum is σ = 46691232. Its totient is φ = 6670168.

The previous prime is 20010491. The next prime is 20010517. The reversal of 20010516 is 61501002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20010495 and 20010504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010517) 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, 833760 + ... + 833783.

It is an arithmetic number, because the mean of its divisors is an integer number (3890936).

Almost surely, 2^20010516 is an apocalyptic number.

It is an amenable number.

20010516 is an abundant number, since it is smaller than the sum of its proper divisors (26680716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010516 is a wasteful number, since it uses less digits than its factorization.

20010516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667550 (or 1667548 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 20010516 is about 4473.3115250338. The cubic root of 20010516 is about 271.4893280164.

Adding to 20010516 its reverse (61501002), we get a palindrome (81511518).

The spelling of 20010516 in words is "twenty million, ten thousand, five hundred sixteen".