21455016327 has 6 divisors (see below), whose sum is σ = 30990579152. Its totient is φ = 14303344212.

The previous prime is 21455016293. The next prime is 21455016329. The reversal of 21455016327 is 72361055412.

21455016327 is a `hidden beast` number, since 2 + 14 + 5 + 5 + 0 + 1 + 632 + 7 = 666.

It is not a de Polignac number, because 21455016327 - 2³¹ = 19307532679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21455016291 and 21455016300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455016329) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1191945343 + ... + 1191945360.

Almost surely, 2^21455016327 is an apocalyptic number.

21455016327 is a deficient number, since it is larger than the sum of its proper divisors (9535562825).

21455016327 is a wasteful number, since it uses less digits than its factorization.

21455016327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383890709 (or 2383890706 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 21455016327 in words is "twenty-one billion, four hundred fifty-five million, sixteen thousand, three hundred twenty-seven".