21467538145 has 16 divisors (see below), whose sum is σ = 26123397120. Its totient is φ = 16932633984.

The previous prime is 21467538143. The next prime is 21467538163. The reversal of 21467538145 is 54183576412.

It is a cyclic number.

It is not a de Polignac number, because 21467538145 - 2¹ = 21467538143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21467538095 and 21467538104.

It is not an unprimeable number, because it can be changed into a prime (21467538143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180512 + ... + 1198558.

It is an arithmetic number, because the mean of its divisors is an integer number (1632712320).

Almost surely, 2^21467538145 is an apocalyptic number.

It is an amenable number.

21467538145 is a deficient number, since it is larger than the sum of its proper divisors (4655858975).

21467538145 is a wasteful number, since it uses less digits than its factorization.

21467538145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21384.

The product of its digits is 806400, while the sum is 46.

The spelling of 21467538145 in words is "twenty-one billion, four hundred sixty-seven million, five hundred thirty-eight thousand, one hundred forty-five".