21004045202 has 16 divisors (see below), whose sum is σ = 36010014720. Its totient is φ = 9000963648.

The previous prime is 21004045177. The next prime is 21004045313. The reversal of 21004045202 is 20254040012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124463 + ... + 239789.

It is an arithmetic number, because the mean of its divisors is an integer number (2250625920).

Almost surely, 2^21004045202 is an apocalyptic number.

21004045202 is a deficient number, since it is larger than the sum of its proper divisors (15005969518).

21004045202 is a wasteful number, since it uses less digits than its factorization.

21004045202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128345.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 21004045202 its reverse (20254040012), we get a palindrome (41258085214).

The spelling of 21004045202 in words is "twenty-one billion, four million, forty-five thousand, two hundred two".