8477830021 has 4 divisors (see below), whose sum is σ = 8637789132. Its totient is φ = 8317870912.

The previous prime is 8477829953. The next prime is 8477830033. The reversal of 8477830021 is 1200387748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5549505025 + 2928324996 = 74495^2 + 54114^2 .

It is a cyclic number.

It is not a de Polignac number, because 8477830021 - 2¹¹ = 8477827973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8477830321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79979476 + ... + 79979581.

It is an arithmetic number, because the mean of its divisors is an integer number (2159447283).

Almost surely, 2^8477830021 is an apocalyptic number.

It is an amenable number.

8477830021 is a deficient number, since it is larger than the sum of its proper divisors (159959111).

8477830021 is a wasteful number, since it uses less digits than its factorization.

8477830021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159959110.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 8477830021 is about 92075.1324788621. The cubic root of 8477830021 is about 2039.0516883063.

The spelling of 8477830021 in words is "eight billion, four hundred seventy-seven million, eight hundred thirty thousand, twenty-one".