21054785276327 has 12 divisors (see below), whose sum is σ = 23889407131968. Its totient is φ = 18523271500800.

The previous prime is 21054785276321. The next prime is 21054785276351. The reversal of 21054785276327 is 72367258745012.

It is not a de Polignac number, because 21054785276327 - 2⁴ = 21054785276311 is a prime.

It is a super-3 number, since 3×21054785276327³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054785276321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2806552538 + ... + 2806560039.

It is an arithmetic number, because the mean of its divisors is an integer number (1990783927664).

Almost surely, 2^{21054785276327} is an apocalyptic number.

21054785276327 is a deficient number, since it is larger than the sum of its proper divisors (2834621855641).

21054785276327 is a wasteful number, since it uses less digits than its factorization.

21054785276327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613112630 (or 5613112619 counting only the distinct ones).

The product of its (nonzero) digits is 39513600, while the sum is 59.

The spelling of 21054785276327 in words is "twenty-one trillion, fifty-four billion, seven hundred eighty-five million, two hundred seventy-six thousand, three hundred twenty-seven".