21002443202 has 32 divisors (see below), whose sum is σ = 34054884864. Its totient is φ = 9656985600.

The previous prime is 21002443199. The next prime is 21002443213. The reversal of 21002443202 is 20234420012.

It is a super-2 number, since 2×21002443202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9515183 + ... + 9517389.

It is an arithmetic number, because the mean of its divisors is an integer number (1064215152).

Almost surely, 2^21002443202 is an apocalyptic number.

21002443202 is a deficient number, since it is larger than the sum of its proper divisors (13052441662).

21002443202 is a wasteful number, since it uses less digits than its factorization.

21002443202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21002443202 its reverse (20234420012), we get a palindrome (41236863214).

The spelling of 21002443202 in words is "twenty-one billion, two million, four hundred forty-three thousand, two hundred two".