20210516 has 12 divisors (see below), whose sum is σ = 36191232. Its totient is φ = 9870168.

The previous prime is 20210513. The next prime is 20210539. The reversal of 20210516 is 61501202.

It is a junction number, because it is equal to n+sod(n) for n = 20210494 and 20210503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58580 + ... + 58923.

It is an arithmetic number, because the mean of its divisors is an integer number (3015936).

Almost surely, 2^20210516 is an apocalyptic number.

It is an amenable number.

20210516 is a deficient number, since it is larger than the sum of its proper divisors (15980716).

20210516 is a wasteful number, since it uses less digits than its factorization.

20210516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117550 (or 117548 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20210516 is about 4495.6107482744. The cubic root of 20210516 is about 272.3908201060.

Adding to 20210516 its reverse (61501202), we get a palindrome (81711718).

The spelling of 20210516 in words is "twenty million, two hundred ten thousand, five hundred sixteen".