21801843103935 has 32 divisors (see below), whose sum is σ = 37082038194432. Its totient is φ = 10900069952000.

The previous prime is 21801843103897. The next prime is 21801843103951. The reversal of 21801843103935 is 53930134810812.

It is not a de Polignac number, because 21801843103935 - 2¹⁷ = 21801842972863 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170249589 + ... + 170377598.

It is an arithmetic number, because the mean of its divisors is an integer number (1158813693576).

Almost surely, 2^{21801843103935} is an apocalyptic number.

21801843103935 is a deficient number, since it is larger than the sum of its proper divisors (15280195090497).

21801843103935 is a wasteful number, since it uses less digits than its factorization.

21801843103935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340627463.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 21801843103935 in words is "twenty-one trillion, eight hundred one billion, eight hundred forty-three million, one hundred three thousand, nine hundred thirty-five".