21885236841 has 64 divisors (see below), whose sum is σ = 34125815808. Its totient is φ = 12354121728.

The previous prime is 21885236809. The next prime is 21885236843. The reversal of 21885236841 is 14863258812.

It is not a de Polignac number, because 21885236841 - 2⁵ = 21885236809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21885236843) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 5514840 + ... + 5518806.

It is an arithmetic number, because the mean of its divisors is an integer number (533215872).

Almost surely, 2^21885236841 is an apocalyptic number.

It is an amenable number.

21885236841 is a deficient number, since it is larger than the sum of its proper divisors (12240578967).

21885236841 is a wasteful number, since it uses less digits than its factorization.

21885236841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210.

The product of its digits is 737280, while the sum is 48.

The spelling of 21885236841 in words is "twenty-one billion, eight hundred eighty-five million, two hundred thirty-six thousand, eight hundred forty-one".