20650508 has 6 divisors (see below), whose sum is σ = 36138396. Its totient is φ = 10325252.

The previous prime is 20650507. The next prime is 20650519. The reversal of 20650508 is 80505602.

It is not an unprimeable number, because it can be changed into a prime (20650501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581310 + ... + 2581317.

It is an arithmetic number, because the mean of its divisors is an integer number (6023066).

Almost surely, 2^20650508 is an apocalyptic number.

It is an amenable number.

20650508 is a deficient number, since it is larger than the sum of its proper divisors (15487888).

20650508 is a wasteful number, since it uses less digits than its factorization.

20650508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162631 (or 5162629 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20650508 is about 4544.2830017507. The cubic root of 20650508 is about 274.3533367599.

The spelling of 20650508 in words is "twenty million, six hundred fifty thousand, five hundred eight".