20099636 has 12 divisors (see below), whose sum is σ = 35226912. Its totient is φ = 10034808.

The previous prime is 20099633. The next prime is 20099689. The reversal of 20099636 is 63699002.

It is a junction number, because it is equal to n+sod(n) for n = 20099596 and 20099605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20099633) 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 in 3 ways as a sum of consecutive naturals, for example, 410 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (2935576).

Almost surely, 2^20099636 is an apocalyptic number.

It is an amenable number.

20099636 is a deficient number, since it is larger than the sum of its proper divisors (15127276).

20099636 is a wasteful number, since it uses less digits than its factorization.

20099636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7510 (or 7508 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 20099636 is about 4483.2617590321. The cubic root of 20099636 is about 271.8917713880.

The spelling of 20099636 in words is "twenty million, ninety-nine thousand, six hundred thirty-six".