21125471296 has 56 divisors (see below), whose sum is σ = 45154681344. Its totient is φ = 9777546240.

The previous prime is 21125471251. The next prime is 21125471299. The reversal of 21125471296 is 69217452112.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21125471299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185845 + ... + 277108.

Almost surely, 2^21125471296 is an apocalyptic number.

It is an amenable number.

21125471296 is an abundant number, since it is smaller than the sum of its proper divisors (24029210048).

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

21125471296 is a wasteful number, since it uses less digits than its factorization.

21125471296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463019 (or 463009 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The spelling of 21125471296 in words is "twenty-one billion, one hundred twenty-five million, four hundred seventy-one thousand, two hundred ninety-six".