20321002 has 16 divisors (see below), whose sum is σ = 32979240. Its totient is φ = 9335232.

The previous prime is 20320999. The next prime is 20321003. The reversal of 20321002 is 20012302.

It can be written as a sum of positive squares in 4 ways, for example, as 20259001 + 62001 = 4501^2 + 249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20321002.

It is not an unprimeable number, because it can be changed into a prime (20321003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4248 + ... + 7660.

Almost surely, 2^20321002 is an apocalyptic number.

20321002 is a deficient number, since it is larger than the sum of its proper divisors (12658238).

20321002 is a wasteful number, since it uses less digits than its factorization.

20321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20321002 is about 4507.8822078666. The cubic root of 20321002 is about 272.8862832391.

Adding to 20321002 its reverse (20012302), we get a palindrome (40333304).

The spelling of 20321002 in words is "twenty million, three hundred twenty-one thousand, two".