20812050 has 72 divisors (see below), whose sum is σ = 63912576. Its totient is φ = 4756320.

The previous prime is 20812039. The next prime is 20812091. The reversal of 20812050 is 5021802.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 154 + ... + 6453.

Almost surely, 2^20812050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20812050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31956288).

20812050 is an abundant number, since it is smaller than the sum of its proper divisors (43100526).

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

20812050 is a wasteful number, since it uses less digits than its factorization.

20812050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20812050 is about 4562.0225777609. The cubic root of 20812050 is about 275.0668707903.

Adding to 20812050 its reverse (5021802), we get a palindrome (25833852).

The spelling of 20812050 in words is "twenty million, eight hundred twelve thousand, fifty".