21147674112 has 120 divisors (see below), whose sum is σ = 61639269120. Its totient is φ = 6979276800.

The previous prime is 21147674087. The next prime is 21147674159.

21147674112 is a `hidden beast` number, since 2 + 1 + 1 + 476 + 74 + 112 = 666.

21147674112 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442689 + ... + 488127.

It is an arithmetic number, because the mean of its divisors is an integer number (513660576).

Almost surely, 2^21147674112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21147674112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30819634560).

21147674112 is an abundant number, since it is smaller than the sum of its proper divisors (40491595008).

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

21147674112 is a wasteful number, since it uses less digits than its factorization.

21147674112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45564 (or 45545 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The spelling of 21147674112 in words is "twenty-one billion, one hundred forty-seven million, six hundred seventy-four thousand, one hundred twelve".