21354325541 has 8 divisors (see below), whose sum is σ = 22073270784. Its totient is φ = 20637261360.

The previous prime is 21354325523. The next prime is 21354325543. The reversal of 21354325541 is 14552345312.

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 21354325541 - 2²² = 21350131237 is a prime.

It is a super-2 number, since 2×21354325541² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354325543) 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, 447161 + ... + 492606.

It is an arithmetic number, because the mean of its divisors is an integer number (2759158848).

Almost surely, 2^21354325541 is an apocalyptic number.

It is an amenable number.

21354325541 is a deficient number, since it is larger than the sum of its proper divisors (718945243).

21354325541 is an equidigital number, since it uses as much as digits as its factorization.

21354325541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940531.

The product of its digits is 72000, while the sum is 35.

The spelling of 21354325541 in words is "twenty-one billion, three hundred fifty-four million, three hundred twenty-five thousand, five hundred forty-one".