21147646014 has 36 divisors (see below), whose sum is σ = 50364027168. Its totient is φ = 6408376920.

The previous prime is 21147645991. The next prime is 21147646021. The reversal of 21147646014 is 41064674112.

It is a happy number.

21147646014 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 7 + 646 + 0 + 1 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21147646014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4852654 + ... + 4857009.

Almost surely, 2^21147646014 is an apocalyptic number.

21147646014 is an abundant number, since it is smaller than the sum of its proper divisors (29216381154).

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

21147646014 is a wasteful number, since it uses less digits than its factorization.

21147646014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709693 (or 9709679 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 21147646014 in words is "twenty-one billion, one hundred forty-seven million, six hundred forty-six thousand, fourteen".