21464204841 has 12 divisors (see below), whose sum is σ = 31588830468. Its totient is φ = 14039479584.

The previous prime is 21464204837. The next prime is 21464204843. The reversal of 21464204841 is 14840246412.

21464204841 is a `hidden beast` number, since 2 + 1 + 4 + 642 + 0 + 4 + 8 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13367984400 + 8096220441 = 115620^2 + 89979^2 .

It is not a de Polignac number, because 21464204841 - 2² = 21464204837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21464204796 and 21464204805.

It is not an unprimeable number, because it can be changed into a prime (21464204843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22498690 + ... + 22499643.

It is an arithmetic number, because the mean of its divisors is an integer number (2632402539).

Almost surely, 2^21464204841 is an apocalyptic number.

It is an amenable number.

21464204841 is a deficient number, since it is larger than the sum of its proper divisors (10124625627).

21464204841 is a wasteful number, since it uses less digits than its factorization.

21464204841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44998392 (or 44998389 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 21464204841 in words is "twenty-one billion, four hundred sixty-four million, two hundred four thousand, eight hundred forty-one".