21173254110 has 24 divisors (see below), whose sum is σ = 55050460920. Its totient is φ = 5646201072.

The previous prime is 21173254099. The next prime is 21173254111. The reversal of 21173254110 is 1145237112.

21173254110 is a `hidden beast` number, since 2 + 117 + 3 + 2 + 541 + 1 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21173254111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117629100 + ... + 117629279.

It is an arithmetic number, because the mean of its divisors is an integer number (2293769205).

Almost surely, 2^21173254110 is an apocalyptic number.

21173254110 is an abundant number, since it is smaller than the sum of its proper divisors (33877206810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21173254110 is a wasteful number, since it uses less digits than its factorization.

21173254110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235258392 (or 235258389 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 21173254110 in words is "twenty-one billion, one hundred seventy-three million, two hundred fifty-four thousand, one hundred ten".