21754201233641 has 4 divisors (see below), whose sum is σ = 22342152618372. Its totient is φ = 21166249848912.

The previous prime is 21754201233587. The next prime is 21754201233691. The reversal of 21754201233641 is 14633210245712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15304526410000 + 6449674823641 = 3912100^2 + 2539621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21754201233641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21754201233691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293975692310 + ... + 293975692383.

It is an arithmetic number, because the mean of its divisors is an integer number (5585538154593).

Almost surely, 2^{21754201233641} is an apocalyptic number.

It is an amenable number.

21754201233641 is a deficient number, since it is larger than the sum of its proper divisors (587951384731).

21754201233641 is an equidigital number, since it uses as much as digits as its factorization.

21754201233641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587951384730.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 21754201233641 in words is "twenty-one trillion, seven hundred fifty-four billion, two hundred one million, two hundred thirty-three thousand, six hundred forty-one".