20489416 has 16 divisors (see below), whose sum is σ = 39456540. Its totient is φ = 9967680.

The previous prime is 20489387. The next prime is 20489423. The reversal of 20489416 is 61498402.

It can be written as a sum of positive squares in 2 ways, for example, as 19766916 + 722500 = 4446^2 + 850^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34315 + ... + 34906.

Almost surely, 2^20489416 is an apocalyptic number.

It is an amenable number.

20489416 is a deficient number, since it is larger than the sum of its proper divisors (18967124).

20489416 is a wasteful number, since it uses less digits than its factorization.

20489416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69264 (or 69260 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20489416 is about 4526.5236108961. The cubic root of 20489416 is about 273.6380750791.

The spelling of 20489416 in words is "twenty million, four hundred eighty-nine thousand, four hundred sixteen".