20001850 has 48 divisors (see below), whose sum is σ = 41622336. Its totient is φ = 7088000.

The previous prime is 20001847. The next prime is 20001853. The reversal of 20001850 is 5810002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20001847) and next prime (20001853).

It is not an unprimeable number, because it can be changed into a prime (20001853) 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 23 ways as a sum of consecutive naturals, for example, 22107 + ... + 22993.

It is an arithmetic number, because the mean of its divisors is an integer number (867132).

Almost surely, 2^20001850 is an apocalyptic number.

20001850 is an abundant number, since it is smaller than the sum of its proper divisors (21620486).

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

20001850 is a wasteful number, since it uses less digits than its factorization.

20001850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 20001850 is about 4472.3427865046. The cubic root of 20001850 is about 271.4501308558.

Adding to 20001850 its reverse (5810002), we get a palindrome (25811852).

The spelling of 20001850 in words is "twenty million, one thousand, eight hundred fifty".