20201850 has 36 divisors (see below), whose sum is σ = 54276846. Its totient is φ = 5387040.

The previous prime is 20201849. The next prime is 20201891. The reversal of 20201850 is 5810202.

It can be written as a sum of positive squares in 3 ways, for example, as 15233409 + 4968441 = 3903^2 + 2229^2 .

It is a super-2 number, since 2×20201850² = 816229486845000, which contains 22 as substring.

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 17 ways as a sum of consecutive naturals, for example, 21997 + ... + 22896.

Almost surely, 2^20201850 is an apocalyptic number.

20201850 is an abundant number, since it is smaller than the sum of its proper divisors (34074996).

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

20201850 is a wasteful number, since it uses less digits than its factorization.

20201850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44911 (or 44903 counting only the distinct ones).

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

The square root of 20201850 is about 4494.6468159356. The cubic root of 20201850 is about 272.3518820219.

The spelling of 20201850 in words is "twenty million, two hundred one thousand, eight hundred fifty".