21054445112 has 8 divisors (see below), whose sum is σ = 39477084600. Its totient is φ = 10527222552.

The previous prime is 21054445043. The next prime is 21054445147. The reversal of 21054445112 is 21154445012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315902812 + ... + 1315902827.

It is an arithmetic number, because the mean of its divisors is an integer number (4934635575).

Almost surely, 2^21054445112 is an apocalyptic number.

It is an amenable number.

21054445112 is a deficient number, since it is larger than the sum of its proper divisors (18422639488).

21054445112 is a wasteful number, since it uses less digits than its factorization.

21054445112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631805645 (or 2631805641 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 21054445112 in words is "twenty-one billion, fifty-four million, four hundred forty-five thousand, one hundred twelve".