20099724 has 24 divisors (see below), whose sum is σ = 47027568. Its totient is φ = 6681600.

The previous prime is 20099719. The next prime is 20099743. The reversal of 20099724 is 42799002.

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 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 6900.

It is an arithmetic number, because the mean of its divisors is an integer number (1959482).

Almost surely, 2^20099724 is an apocalyptic number.

It is an amenable number.

20099724 is an abundant number, since it is smaller than the sum of its proper divisors (26927844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20099724 is a wasteful number, since it uses less digits than its factorization.

20099724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585 (or 4583 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20099724 is about 4483.2715733045. The cubic root of 20099724 is about 271.8921681852.

The spelling of 20099724 in words is "twenty million, ninety-nine thousand, seven hundred twenty-four".