20316249 has 6 divisors (see below), whose sum is σ = 29345706. Its totient is φ = 13544160.

The previous prime is 20316239. The next prime is 20316259. The reversal of 20316249 is 94261302.

20316249 is a `hidden beast` number, since 2 + 0 + 31 + 624 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (20316239) and next prime (20316259).

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 1550025 = 4332^2 + 1245^2 .

It is not a de Polignac number, because 20316249 - 2⁵ = 20316217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20316229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128672 + ... + 1128689.

It is an arithmetic number, because the mean of its divisors is an integer number (4890951).

Almost surely, 2^20316249 is an apocalyptic number.

It is an amenable number.

20316249 is a deficient number, since it is larger than the sum of its proper divisors (9029457).

20316249 is a wasteful number, since it uses less digits than its factorization.

20316249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257367 (or 2257364 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20316249 is about 4507.3549893480. The cubic root of 20316249 is about 272.8650059149.

The spelling of 20316249 in words is "twenty million, three hundred sixteen thousand, two hundred forty-nine".