21717342155612 has 24 divisors (see below), whose sum is σ = 40242472162704. Its totient is φ = 10219541050112.

The previous prime is 21717342155609. The next prime is 21717342155623. The reversal of 21717342155612 is 21655124371712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4186523 + ... + 7807794.

It is an arithmetic number, because the mean of its divisors is an integer number (1676769673446).

Almost surely, 2^{21717342155612} is an apocalyptic number.

It is an amenable number.

21717342155612 is a deficient number, since it is larger than the sum of its proper divisors (18525130007092).

21717342155612 is a wasteful number, since it uses less digits than its factorization.

21717342155612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12020965 (or 12020963 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The spelling of 21717342155612 in words is "twenty-one trillion, seven hundred seventeen billion, three hundred forty-two million, one hundred fifty-five thousand, six hundred twelve".