20900044 has 24 divisors (see below), whose sum is σ = 40028688. Its totient is φ = 9469440.

The previous prime is 20899993. The next prime is 20900051. The reversal of 20900044 is 44000902.

It is a junction number, because it is equal to n+sod(n) for n = 20899994 and 20900030.

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, 18504 + ... + 19600.

It is an arithmetic number, because the mean of its divisors is an integer number (1667862).

Almost surely, 2^20900044 is an apocalyptic number.

It is an amenable number.

20900044 is a deficient number, since it is larger than the sum of its proper divisors (19128644).

20900044 is a wasteful number, since it uses less digits than its factorization.

20900044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20900044 is about 4571.6565925275. The cubic root of 20900044 is about 275.4539895034.

Adding to 20900044 its reverse (44000902), we get a palindrome (64900946).

The spelling of 20900044 in words is "twenty million, nine hundred thousand, forty-four".