21435605660541 has 8 divisors (see below), whose sum is σ = 28751950108224. Its totient is φ = 14204832493280.

The previous prime is 21435605660471. The next prime is 21435605660569. The reversal of 21435605660541 is 14506650653412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21435605660541 - 2¹⁴ = 21435605644157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435605660041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21392819520 + ... + 21392820521.

It is an arithmetic number, because the mean of its divisors is an integer number (3593993763528).

Almost surely, 2^{21435605660541} is an apocalyptic number.

It is an amenable number.

21435605660541 is a deficient number, since it is larger than the sum of its proper divisors (7316344447683).

21435605660541 is a wasteful number, since it uses less digits than its factorization.

21435605660541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42785640211.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 21435605660541 in words is "twenty-one trillion, four hundred thirty-five billion, six hundred five million, six hundred sixty thousand, five hundred forty-one".