21113546814432 has 72 divisors (see below), whose sum is σ = 60326206504200. Its totient is φ = 7004494183680.

The previous prime is 21113546814431. The next prime is 21113546814539. The reversal of 21113546814432 is 23441864531112.

It is a happy number.

21113546814432 is a `hidden beast` number, since 2 + 1 + 1 + 13 + 5 + 468 + 144 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113546814431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173661807 + ... + 173783342.

It is an arithmetic number, because the mean of its divisors is an integer number (837863979225).

Almost surely, 2^{21113546814432} is an apocalyptic number.

It is an amenable number.

21113546814432 is an abundant number, since it is smaller than the sum of its proper divisors (39212659689768).

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

21113546814432 is a wasteful number, since it uses less digits than its factorization.

21113546814432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347445376 (or 347445365 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 21113546814432 in words is "twenty-one trillion, one hundred thirteen billion, five hundred forty-six million, eight hundred fourteen thousand, four hundred thirty-two".