20006693 has 8 divisors (see below), whose sum is σ = 22917888. Its totient is φ = 17108784.

The previous prime is 20006683. The next prime is 20006717. The reversal of 20006693 is 39660002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20006693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 6327.

It is an arithmetic number, because the mean of its divisors is an integer number (2864736).

Almost surely, 2^20006693 is an apocalyptic number.

It is an amenable number.

20006693 is a deficient number, since it is larger than the sum of its proper divisors (2911195).

20006693 is an equidigital number, since it uses as much as digits as its factorization.

20006693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20006693 is about 4472.8841925541. The cubic root of 20006693 is about 271.4720376110.

Adding to 20006693 its reverse (39660002), we get a palindrome (59666695).

The spelling of 20006693 in words is "twenty million, six thousand, six hundred ninety-three".