20893965 has 16 divisors (see below), whose sum is σ = 33998400. Its totient is φ = 10954112.

The previous prime is 20893963. The next prime is 20893967. The reversal of 20893965 is 56939802.

It is an interprime number because it is at equal distance from previous prime (20893963) and next prime (20893967).

It is a cyclic number.

It is not a de Polignac number, because 20893965 - 2¹ = 20893963 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20893963) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10920 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (2124900).

Almost surely, 2^20893965 is an apocalyptic number.

It is an amenable number.

20893965 is a deficient number, since it is larger than the sum of its proper divisors (13104435).

20893965 is a wasteful number, since it uses less digits than its factorization.

20893965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23676.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20893965 is about 4570.9916867131. The cubic root of 20893965 is about 275.4272806733.

The spelling of 20893965 in words is "twenty million, eight hundred ninety-three thousand, nine hundred sixty-five".