20772317 has 8 divisors (see below), whose sum is σ = 22102272. Its totient is φ = 19454400.

The previous prime is 20772313. The next prime is 20772329. The reversal of 20772317 is 71327702.

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

It is a cyclic number.

It is not a de Polignac number, because 20772317 - 2² = 20772313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20772317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772313) 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, 692 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (2762784).

Almost surely, 2^20772317 is an apocalyptic number.

It is an amenable number.

20772317 is a deficient number, since it is larger than the sum of its proper divisors (1329955).

20772317 is a wasteful number, since it uses less digits than its factorization.

20772317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 20772317 is about 4557.6657402666. The cubic root of 20772317 is about 274.8917127370.

The spelling of 20772317 in words is "twenty million, seven hundred seventy-two thousand, three hundred seventeen".