20599216 has 20 divisors (see below), whose sum is σ = 43539624. Its totient is φ = 9363200.

The previous prime is 20599199. The next prime is 20599231. The reversal of 20599216 is 61299502.

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, 58345 + ... + 58696.

Almost surely, 2^20599216 is an apocalyptic number.

It is an amenable number.

20599216 is an abundant number, since it is smaller than the sum of its proper divisors (22940408).

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

20599216 is a wasteful number, since it uses less digits than its factorization.

20599216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117060 (or 117054 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 20599216 is about 4538.6359184231. The cubic root of 20599216 is about 274.1260009756.

The spelling of 20599216 in words is "twenty million, five hundred ninety-nine thousand, two hundred sixteen".