21467563161 has 32 divisors (see below), whose sum is σ = 33765838848. Its totient is φ = 11984759040.

The previous prime is 21467563157. The next prime is 21467563241. The reversal of 21467563161 is 16136576412.

It is not a de Polignac number, because 21467563161 - 2² = 21467563157 is a prime.

It is a super-3 number, since 3×21467563161³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21467563151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380725 + ... + 433458.

It is an arithmetic number, because the mean of its divisors is an integer number (1055182464).

Almost surely, 2^21467563161 is an apocalyptic number.

It is an amenable number.

21467563161 is a deficient number, since it is larger than the sum of its proper divisors (12298275687).

21467563161 is a wasteful number, since it uses less digits than its factorization.

21467563161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814261.

The product of its digits is 181440, while the sum is 42.

The spelling of 21467563161 in words is "twenty-one billion, four hundred sixty-seven million, five hundred sixty-three thousand, one hundred sixty-one".