21175004154147 has 16 divisors (see below), whose sum is σ = 28421961120000. Its totient is φ = 14022529946784.

The previous prime is 21175004154137. The next prime is 21175004154191. The reversal of 21175004154147 is 74145140057112.

It is not a de Polignac number, because 21175004154147 - 2²⁴ = 21174987376931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21175004154099 and 21175004154108.

It is not an unprimeable number, because it can be changed into a prime (21175004154137) 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, 20960272 + ... + 21947277.

It is an arithmetic number, because the mean of its divisors is an integer number (1776372570000).

Almost surely, 2^{21175004154147} is an apocalyptic number.

21175004154147 is a deficient number, since it is larger than the sum of its proper divisors (7246956965853).

21175004154147 is a wasteful number, since it uses less digits than its factorization.

21175004154147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42908650.

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 21175004154147 in words is "twenty-one trillion, one hundred seventy-five billion, four million, one hundred fifty-four thousand, one hundred forty-seven".