21655055456024 has 32 divisors (see below), whose sum is σ = 41583761803920. Its totient is φ = 10569110501376.

The previous prime is 21655055456009. The next prime is 21655055456059. The reversal of 21655055456024 is 42065455055612.

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, 191080334 + ... + 191193629.

Almost surely, 2^{21655055456024} is an apocalyptic number.

It is an amenable number.

21655055456024 is a deficient number, since it is larger than the sum of its proper divisors (19928706347896).

21655055456024 is a wasteful number, since it uses less digits than its factorization.

21655055456024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382274139 (or 382274135 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 50.

The spelling of 21655055456024 in words is "twenty-one trillion, six hundred fifty-five billion, fifty-five million, four hundred fifty-six thousand, twenty-four".