21754547841 has 16 divisors (see below), whose sum is σ = 31239944960. Its totient is φ = 13386280320.

The previous prime is 21754547827. The next prime is 21754547891. The reversal of 21754547841 is 14874545712.

It is not a de Polignac number, because 21754547841 - 2⁹ = 21754547329 is a prime.

It is a super-2 number, since 2×21754547841² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21754547891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897165 + ... + 921093.

It is an arithmetic number, because the mean of its divisors is an integer number (1952496560).

Almost surely, 2^21754547841 is an apocalyptic number.

It is an amenable number.

21754547841 is a deficient number, since it is larger than the sum of its proper divisors (9485397119).

21754547841 is a wasteful number, since it uses less digits than its factorization.

21754547841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47256.

The product of its digits is 1254400, while the sum is 48.

The spelling of 21754547841 in words is "twenty-one billion, seven hundred fifty-four million, five hundred forty-seven thousand, eight hundred forty-one".