21354742540541 has 8 divisors (see below), whose sum is σ = 21394101896544. Its totient is φ = 21315384352080.

The previous prime is 21354742540529. The next prime is 21354742540583. The reversal of 21354742540541 is 14504524745312.

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 21354742540541 - 2³⁰ = 21353668798717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354742500541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41943086 + ... + 42449168.

It is an arithmetic number, because the mean of its divisors is an integer number (2674262737068).

Almost surely, 2^{21354742540541} is an apocalyptic number.

It is an amenable number.

21354742540541 is a deficient number, since it is larger than the sum of its proper divisors (39359356003).

21354742540541 is an equidigital number, since it uses as much as digits as its factorization.

21354742540541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583771.

The product of its (nonzero) digits is 2688000, while the sum is 47.

The spelling of 21354742540541 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-two million, five hundred forty thousand, five hundred forty-one".