21175004154148 has 24 divisors (see below), whose sum is σ = 39917609766720. Its totient is φ = 9770416513440.

The previous prime is 21175004154137. The next prime is 21175004154191. The reversal of 21175004154148 is 84145140057112.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 55272418 + ... + 55654201.

It is an arithmetic number, because the mean of its divisors is an integer number (1663233740280).

Almost surely, 2^{21175004154148} is an apocalyptic number.

It is an amenable number.

21175004154148 is a deficient number, since it is larger than the sum of its proper divisors (18742605612572).

21175004154148 is a wasteful number, since it uses less digits than its factorization.

21175004154148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110930307 (or 110930305 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 21175004154148 in words is "twenty-one trillion, one hundred seventy-five billion, four million, one hundred fifty-four thousand, one hundred forty-eight".