21641200035 has 128 divisors (see below), whose sum is σ = 43665162240. Its totient is φ = 8910176256.

The previous prime is 21641199977. The next prime is 21641200067. The reversal of 21641200035 is 53000214612.

It is not a de Polignac number, because 21641200035 - 2⁷ = 21641199907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21641199978 and 21641200014.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9664446 + ... + 9666684.

It is an arithmetic number, because the mean of its divisors is an integer number (341134080).

Almost surely, 2^21641200035 is an apocalyptic number.

21641200035 is an abundant number, since it is smaller than the sum of its proper divisors (22023962205).

21641200035 is a wasteful number, since it uses less digits than its factorization.

21641200035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21641200035 its reverse (53000214612), we get a palindrome (74641414647).

The spelling of 21641200035 in words is "twenty-one billion, six hundred forty-one million, two hundred thousand, thirty-five".