20199408 has 40 divisors (see below), whose sum is σ = 52401408. Its totient is φ = 6704832.

The previous prime is 20199397. The next prime is 20199409. The reversal of 20199408 is 80499102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199409) 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 7 ways as a sum of consecutive naturals, for example, 12841 + ... + 14327.

Almost surely, 2^20199408 is an apocalyptic number.

It is an amenable number.

20199408 is an abundant number, since it is smaller than the sum of its proper divisors (32202000).

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

20199408 is a wasteful number, since it uses less digits than its factorization.

20199408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20199408 is about 4494.3751512307. The cubic root of 20199408 is about 272.3409076129.

The spelling of 20199408 in words is "twenty million, one hundred ninety-nine thousand, four hundred eight".