21727550550051 has 96 divisors (see below), whose sum is σ = 33317296922624. Its totient is φ = 13622805504000.

The previous prime is 21727550549981. The next prime is 21727550550091. The reversal of 21727550550051 is 15005505572712.

21727550550051 is a `hidden beast` number, since 2 + 1 + 72 + 75 + 5 + 0 + 5 + 500 + 5 + 1 = 666.

It is not a de Polignac number, because 21727550550051 - 2¹¹ = 21727550548003 is a prime.

It is a super-2 number, since 2×21727550550051² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21727550549979 and 21727550550006.

It is not an unprimeable number, because it can be changed into a prime (21727550550091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4114284531 + ... + 4114289811.

Almost surely, 2^{21727550550051} is an apocalyptic number.

21727550550051 is a deficient number, since it is larger than the sum of its proper divisors (11589746372573).

21727550550051 is a wasteful number, since it uses less digits than its factorization.

21727550550051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 7022 counting only the distinct ones).

The product of its (nonzero) digits is 612500, while the sum is 45.

The spelling of 21727550550051 in words is "twenty-one trillion, seven hundred twenty-seven billion, five hundred fifty million, five hundred fifty thousand, fifty-one".