20199056 has 10 divisors (see below), whose sum is σ = 39135702. Its totient is φ = 10099520.

The previous prime is 20199041. The next prime is 20199059. The reversal of 20199056 is 65099102.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 839056 = 4400^2 + 916^2 .

It is a super-2 number, since 2×20199056² = 816003726582272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20199059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631205 + ... + 631236.

Almost surely, 2^20199056 is an apocalyptic number.

It is an amenable number.

20199056 is a deficient number, since it is larger than the sum of its proper divisors (18936646).

20199056 is a wasteful number, since it uses less digits than its factorization.

20199056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262449 (or 1262443 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20199056 is about 4494.3359910002. The cubic root of 20199056 is about 272.3393256431.

The spelling of 20199056 in words is "twenty million, one hundred ninety-nine thousand, fifty-six".