21452134615147 has 16 divisors (see below), whose sum is σ = 22201425216000. Its totient is φ = 20712299650560.

The previous prime is 21452134615139. The next prime is 21452134615181. The reversal of 21452134615147 is 74151643125412.

It is a cyclic number.

It is not a de Polignac number, because 21452134615147 - 2³ = 21452134615139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21452134615097 and 21452134615106.

It is not an unprimeable number, because it can be changed into a prime (21452134615187) 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, 820522 + ... + 6601327.

It is an arithmetic number, because the mean of its divisors is an integer number (1387589076000).

Almost surely, 2^{21452134615147} is an apocalyptic number.

21452134615147 is a deficient number, since it is larger than the sum of its proper divisors (749290600853).

21452134615147 is a wasteful number, since it uses less digits than its factorization.

21452134615147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422486.

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

The spelling of 21452134615147 in words is "twenty-one trillion, four hundred fifty-two billion, one hundred thirty-four million, six hundred fifteen thousand, one hundred forty-seven".