21217153767016 has 32 divisors (see below), whose sum is σ = 43953694511040. Its totient is φ = 9550432384768.

The previous prime is 21217153766981. The next prime is 21217153767023. The reversal of 21217153767016 is 61076735171212.

It is a super-3 number, since 3×21217153767016³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3391485646 + ... + 3391491901.

It is an arithmetic number, because the mean of its divisors is an integer number (1373552953470).

Almost surely, 2^{21217153767016} is an apocalyptic number.

It is an amenable number.

21217153767016 is an abundant number, since it is smaller than the sum of its proper divisors (22736540744024).

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

21217153767016 is a wasteful number, since it uses less digits than its factorization.

21217153767016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782977593 (or 6782977589 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 21217153767016 in words is "twenty-one trillion, two hundred seventeen billion, one hundred fifty-three million, seven hundred sixty-seven thousand, sixteen".