21013754112 has 108 divisors (see below), whose sum is σ = 65248529164. Its totient is φ = 6465761280.

The previous prime is 21013754059. The next prime is 21013754117. The reversal of 21013754112 is 21145731012.

21013754112 is a `hidden beast` number, since 2 + 101 + 3 + 7 + 541 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12974121216 + 8039632896 = 113904^2 + 89664^2 .

It is not an unprimeable number, because it can be changed into a prime (21013754117) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 320839 + ... + 380742.

Almost surely, 2^21013754112 is an apocalyptic number.

It is an amenable number.

21013754112 is an abundant number, since it is smaller than the sum of its proper divisors (44234775052).

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

21013754112 is a wasteful number, since it uses less digits than its factorization.

21013754112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701616 (or 701599 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 21013754112 in words is "twenty-one billion, thirteen million, seven hundred fifty-four thousand, one hundred twelve".