21000224035 has 16 divisors (see below), whose sum is σ = 29097222336. Its totient is φ = 14251696128.

The previous prime is 21000224033. The next prime is 21000224039. The reversal of 21000224035 is 53042200012.

It is a cyclic number.

It is not a de Polignac number, because 21000224035 - 2¹ = 21000224033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000224033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3089422 + ... + 3096211.

It is an arithmetic number, because the mean of its divisors is an integer number (1818576396).

Almost surely, 2^21000224035 is an apocalyptic number.

21000224035 is a deficient number, since it is larger than the sum of its proper divisors (8096998301).

21000224035 is an equidigital number, since it uses as much as digits as its factorization.

21000224035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185742.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 21000224035 its reverse (53042200012), we get a palindrome (74042424047).

The spelling of 21000224035 in words is "twenty-one billion, two hundred twenty-four thousand, thirty-five".