21438853902176 has 24 divisors (see below), whose sum is σ = 42476582761200. Its totient is φ = 10651150343808.

The previous prime is 21438853902157. The next prime is 21438853902181. The reversal of 21438853902176 is 67120935883412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133638876 + ... + 2133648923.

It is an arithmetic number, because the mean of its divisors is an integer number (1769857615050).

It is a 1-persistent number, because it is pandigital, but 2⋅21438853902176 = 42877707804352 is not.

Almost surely, 2^{21438853902176} is an apocalyptic number.

It is an amenable number.

21438853902176 is a deficient number, since it is larger than the sum of its proper divisors (21037728859024).

21438853902176 is a wasteful number, since it uses less digits than its factorization.

21438853902176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4267287966 (or 4267287958 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 21438853902176 in words is "twenty-one trillion, four hundred thirty-eight billion, eight hundred fifty-three million, nine hundred two thousand, one hundred seventy-six".