20001044 has 24 divisors (see below), whose sum is σ = 42356160. Its totient is φ = 8067456.

The previous prime is 20001031. The next prime is 20001067. The reversal of 20001044 is 44010002.

It is a super-2 number, since 2×20001044² = 800083522179872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20534 + ... + 21485.

It is an arithmetic number, because the mean of its divisors is an integer number (1764840).

Almost surely, 2^20001044 is an apocalyptic number.

It is an amenable number.

20001044 is an abundant number, since it is smaller than the sum of its proper divisors (22355116).

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

20001044 is a wasteful number, since it uses less digits than its factorization.

20001044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42047 (or 42045 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20001044 is about 4472.2526762248. The cubic root of 20001044 is about 271.4464846640.

Adding to 20001044 its reverse (44010002), we get a palindrome (64011046).

The spelling of 20001044 in words is "twenty million, one thousand, forty-four".