20774199 has 8 divisors (see below), whose sum is σ = 27984880. Its totient is φ = 13706496.

The previous prime is 20774197. The next prime is 20774213. The reversal of 20774199 is 99147702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20774199 - 2¹ = 20774197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35404 + ... + 35985.

It is an arithmetic number, because the mean of its divisors is an integer number (3498110).

Almost surely, 2^20774199 is an apocalyptic number.

20774199 is a deficient number, since it is larger than the sum of its proper divisors (7210681).

20774199 is an equidigital number, since it uses as much as digits as its factorization.

20774199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71489.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 20774199 is about 4557.8722009289. The cubic root of 20774199 is about 274.9000143399.

The spelling of 20774199 in words is "twenty million, seven hundred seventy-four thousand, one hundred ninety-nine".