20489908 has 6 divisors (see below), whose sum is σ = 35857346. Its totient is φ = 10244952.

The previous prime is 20489899. The next prime is 20489927. The reversal of 20489908 is 80998402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 2748964 = 4212^2 + 1658^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561235 + ... + 2561242.

Almost surely, 2^20489908 is an apocalyptic number.

It is an amenable number.

20489908 is a deficient number, since it is larger than the sum of its proper divisors (15367438).

20489908 is a wasteful number, since it uses less digits than its factorization.

20489908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122481 (or 5122479 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20489908 is about 4526.5779569118. The cubic root of 20489908 is about 273.6402652970.

The spelling of 20489908 in words is "twenty million, four hundred eighty-nine thousand, nine hundred eight".