21020313002 has 8 divisors (see below), whose sum is σ = 33955890276. Its totient is φ = 9701682912.

The previous prime is 21020312953. The next prime is 21020313007. The reversal of 21020313002 is 20031302012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20914655161 + 105657841 = 144619^2 + 10279^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21020313007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404236763 + ... + 404236814.

Almost surely, 2^21020313002 is an apocalyptic number.

21020313002 is a deficient number, since it is larger than the sum of its proper divisors (12935577274).

21020313002 is a wasteful number, since it uses less digits than its factorization.

21020313002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808473592.

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

Adding to 21020313002 its reverse (20031302012), we get a palindrome (41051615014).

The spelling of 21020313002 in words is "twenty-one billion, twenty million, three hundred thirteen thousand, two".