21147161067 has 24 divisors (see below), whose sum is σ = 32952969504. Its totient is φ = 13018447104.

The previous prime is 21147160939. The next prime is 21147161071. The reversal of 21147161067 is 76016174112.

21147161067 is a `hidden beast` number, since 21 + 14 + 7 + 1 + 610 + 6 + 7 = 666.

It is not a de Polignac number, because 21147161067 - 2⁷ = 21147160939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21147161267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1295823 + ... + 1312040.

It is an arithmetic number, because the mean of its divisors is an integer number (1373040396).

Almost surely, 2^21147161067 is an apocalyptic number.

21147161067 is a deficient number, since it is larger than the sum of its proper divisors (11805808437).

21147161067 is a wasteful number, since it uses less digits than its factorization.

21147161067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607939 (or 2607936 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 21147161067 in words is "twenty-one billion, one hundred forty-seven million, one hundred sixty-one thousand, sixty-seven".