21546411376 has 40 divisors (see below), whose sum is σ = 47949708800. Its totient is φ = 9187763904.

The previous prime is 21546411353. The next prime is 21546411409. The reversal of 21546411376 is 67311464512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461076 + ... + 505651.

It is an arithmetic number, because the mean of its divisors is an integer number (1198742720).

Almost surely, 2^21546411376 is an apocalyptic number.

It is an amenable number.

21546411376 is an abundant number, since it is smaller than the sum of its proper divisors (26403297424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21546411376 is a wasteful number, since it uses less digits than its factorization.

21546411376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966941 (or 966935 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

Adding to 21546411376 its reverse (67311464512), we get a palindrome (88857875888).

The spelling of 21546411376 in words is "twenty-one billion, five hundred forty-six million, four hundred eleven thousand, three hundred seventy-six".