20696593 has 4 divisors (see below), whose sum is σ = 20886580. Its totient is φ = 20506608.

The previous prime is 20696587. The next prime is 20696699. The reversal of 20696593 is 39569602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17833729 + 2862864 = 4223^2 + 1692^2 .

It is a cyclic number.

It is not a de Polignac number, because 20696593 - 2¹⁷ = 20565521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20696503) 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 3 ways as a sum of consecutive naturals, for example, 94830 + ... + 95047.

It is an arithmetic number, because the mean of its divisors is an integer number (5221645).

Almost surely, 2^20696593 is an apocalyptic number.

It is an amenable number.

20696593 is a deficient number, since it is larger than the sum of its proper divisors (189987).

20696593 is a wasteful number, since it uses less digits than its factorization.

20696593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189986.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 20696593 is about 4549.3508328112. The cubic root of 20696593 is about 274.5572733050.

The spelling of 20696593 in words is "twenty million, six hundred ninety-six thousand, five hundred ninety-three".