20883665 has 8 divisors (see below), whose sum is σ = 27338688. Its totient is φ = 15188080.

The previous prime is 20883647. The next prime is 20883671. The reversal of 20883665 is 56638802.

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

It is not a de Polignac number, because 20883665 - 2¹⁴ = 20867281 is a prime.

It is a super-2 number, since 2×20883665² = 872254927664450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189797 + ... + 189906.

It is an arithmetic number, because the mean of its divisors is an integer number (3417336).

Almost surely, 2^20883665 is an apocalyptic number.

It is an amenable number.

20883665 is a deficient number, since it is larger than the sum of its proper divisors (6455023).

20883665 is a wasteful number, since it uses less digits than its factorization.

20883665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379719.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 20883665 is about 4569.8648776523. The cubic root of 20883665 is about 275.3820145357.

The spelling of 20883665 in words is "twenty million, eight hundred eighty-three thousand, six hundred sixty-five".