8275021920 has 144 divisors (see below), whose sum is σ = 30805708752. Its totient is φ = 2006062080.

The previous prime is 8275021913. The next prime is 8275021939. The reversal of 8275021920 is 291205728.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245367 + ... + 277046.

It is an arithmetic number, because the mean of its divisors is an integer number (213928533).

Almost surely, 2^8275021920 is an apocalyptic number.

8275021920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8275021920 is an abundant number, since it is smaller than the sum of its proper divisors (22530686832).

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

8275021920 is a wasteful number, since it uses less digits than its factorization.

8275021920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522445 (or 522434 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 8275021920 is about 90967.1474764379. The cubic root of 8275021920 is about 2022.6607684092.

The spelling of 8275021920 in words is "eight billion, two hundred seventy-five million, twenty-one thousand, nine hundred twenty".