8363218920 has 64 divisors (see below), whose sum is σ = 28673896320. Its totient is φ = 1911592704.

The previous prime is 8363218883. The next prime is 8363218933. The reversal of 8363218920 is 298123638.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 4977267 + ... + 4978946.

It is an arithmetic number, because the mean of its divisors is an integer number (448029630).

Almost surely, 2^8363218920 is an apocalyptic number.

It is an amenable number.

8363218920 is an abundant number, since it is smaller than the sum of its proper divisors (20310677400).

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

8363218920 is a wasteful number, since it uses less digits than its factorization.

8363218920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956234 (or 9956230 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 8363218920 is about 91450.6365204748. The cubic root of 8363218920 is about 2029.8213760501.

The spelling of 8363218920 in words is "eight billion, three hundred sixty-three million, two hundred eighteen thousand, nine hundred twenty".