20321006 has 12 divisors (see below), whose sum is σ = 31866072. Its totient is φ = 9718236.

The previous prime is 20321003. The next prime is 20321009. The reversal of 20321006 is 60012302.

It is an interprime number because it is at equal distance from previous prime (20321003) and next prime (20321009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321003) 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 5 ways as a sum of consecutive naturals, for example, 8546 + ... + 10661.

It is an arithmetic number, because the mean of its divisors is an integer number (2655506).

Almost surely, 2^20321006 is an apocalyptic number.

20321006 is a deficient number, since it is larger than the sum of its proper divisors (11545066).

20321006 is a wasteful number, since it uses less digits than its factorization.

20321006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19255 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20321006 is about 4507.8826515339. The cubic root of 20321006 is about 272.8863011441.

Adding to 20321006 its reverse (60012302), we get a palindrome (80333308).

The spelling of 20321006 in words is "twenty million, three hundred twenty-one thousand, six".