20489841 has 20 divisors (see below), whose sum is σ = 30857904. Its totient is φ = 13548600.

The previous prime is 20489813. The next prime is 20489867. The reversal of 20489841 is 14898402.

It is not a de Polignac number, because 20489841 - 2¹¹ = 20487793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20489796 and 20489805.

It is not an unprimeable number, because it can be changed into a prime (20489881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9646 + ... + 11576.

Almost surely, 2^20489841 is an apocalyptic number.

It is an amenable number.

20489841 is a deficient number, since it is larger than the sum of its proper divisors (10368063).

20489841 is a wasteful number, since it uses less digits than its factorization.

20489841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 20489841 is about 4526.5705561716. The cubic root of 20489841 is about 273.6399670377.

The spelling of 20489841 in words is "twenty million, four hundred eighty-nine thousand, eight hundred forty-one".