21440895670012 has 54 divisors (see below), whose sum is σ = 47263310033688. Its totient is φ = 8482112559648.

The previous prime is 21440895669943. The next prime is 21440895670069. The reversal of 21440895670012 is 21007659804412.

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 323612808 + ... + 323679055.

Almost surely, 2^{21440895670012} is an apocalyptic number.

It is an amenable number.

21440895670012 is an abundant number, since it is smaller than the sum of its proper divisors (25822414363676).

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

21440895670012 is a wasteful number, since it uses less digits than its factorization.

21440895670012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647291907 (or 647291885 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 21440895670012 in words is "twenty-one trillion, four hundred forty billion, eight hundred ninety-five million, six hundred seventy thousand, twelve".