21641641103 has 16 divisors (see below), whose sum is σ = 23127845760. Its totient is φ = 20219786496.

The previous prime is 21641641093. The next prime is 21641641127. The reversal of 21641641103 is 30114614612.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21641641103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21641641403) 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, 25238 + ... + 209571.

It is an arithmetic number, because the mean of its divisors is an integer number (1445490360).

Almost surely, 2^21641641103 is an apocalyptic number.

21641641103 is a deficient number, since it is larger than the sum of its proper divisors (1486204657).

21641641103 is a wasteful number, since it uses less digits than its factorization.

21641641103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234946.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 21641641103 in words is "twenty-one billion, six hundred forty-one million, six hundred forty-one thousand, one hundred three".