20499896 has 16 divisors (see below), whose sum is σ = 39255840. Its totient is φ = 10031680.

The previous prime is 20499893. The next prime is 20499907. The reversal of 20499896 is 69899402.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 20499896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20499893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26885 + ... + 27636.

It is an arithmetic number, because the mean of its divisors is an integer number (2453490).

Almost surely, 2^20499896 is an apocalyptic number.

It is an amenable number.

20499896 is a deficient number, since it is larger than the sum of its proper divisors (18755944).

20499896 is a wasteful number, since it uses less digits than its factorization.

20499896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54574 (or 54570 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 20499896 is about 4527.6810841754. The cubic root of 20499896 is about 273.6847209219.

The spelling of 20499896 in words is "twenty million, four hundred ninety-nine thousand, eight hundred ninety-six".