20499604 has 12 divisors (see below), whose sum is σ = 35937664. Its totient is φ = 10231704.

The previous prime is 20499571. The next prime is 20499659. The reversal of 20499604 is 40699402.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20499604.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1794 + ... + 6649.

Almost surely, 2^20499604 is an apocalyptic number.

It is an amenable number.

20499604 is a deficient number, since it is larger than the sum of its proper divisors (15438060).

20499604 is a wasteful number, since it uses less digits than its factorization.

20499604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9054 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20499604 is about 4527.6488379732. The cubic root of 20499604 is about 273.6834214630.

The spelling of 20499604 in words is "twenty million, four hundred ninety-nine thousand, six hundred four".