21356676027 has 10 divisors (see below), whose sum is σ = 31903182828. Its totient is φ = 14237783964.

The previous prime is 21356675993. The next prime is 21356676041. The reversal of 21356676027 is 72067665312.

21356676027 is a `hidden beast` number, since 2 + 1 + 3 + 566 + 7 + 60 + 27 = 666.

It is not a de Polignac number, because 21356676027 - 2¹¹ = 21356673979 is a prime.

It is a super-2 number, since 2×21356676027² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21356676127) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131831253 + ... + 131831414.

Almost surely, 2^21356676027 is an apocalyptic number.

21356676027 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21356676027 is a deficient number, since it is larger than the sum of its proper divisors (10546506801).

21356676027 is an equidigital number, since it uses as much as digits as its factorization.

21356676027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263662679 (or 263662670 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 21356676027 in words is "twenty-one billion, three hundred fifty-six million, six hundred seventy-six thousand, twenty-seven".