21010304402 has 8 divisors (see below), whose sum is σ = 31704172416. Its totient is φ = 10442246932.

The previous prime is 21010304401. The next prime is 21010304503. The reversal of 21010304402 is 20440301012.

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 (21010304401) 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, 31452218 + ... + 31452885.

It is an arithmetic number, because the mean of its divisors is an integer number (3963021552).

Almost surely, 2^21010304402 is an apocalyptic number.

21010304402 is a deficient number, since it is larger than the sum of its proper divisors (10693868014).

21010304402 is a wasteful number, since it uses less digits than its factorization.

21010304402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62905272.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21010304402 its reverse (20440301012), we get a palindrome (41450605414).

The spelling of 21010304402 in words is "twenty-one billion, ten million, three hundred four thousand, four hundred two".