21073575120 has 80 divisors (see below), whose sum is σ = 70353330432. Its totient is φ = 5187340800.

The previous prime is 21073575073. The next prime is 21073575137. The reversal of 21073575120 is 2157537012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3374056 + ... + 3380295.

Almost surely, 2^21073575120 is an apocalyptic number.

21073575120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21073575120 is an abundant number, since it is smaller than the sum of its proper divisors (49279755312).

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

21073575120 is a wasteful number, since it uses less digits than its factorization.

21073575120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6754380 (or 6754374 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The spelling of 21073575120 in words is "twenty-one billion, seventy-three million, five hundred seventy-five thousand, one hundred twenty".