320099209920 has 168 divisors, whose sum is σ = 1258294830624. Its totient is φ = 73165529088.

The previous prime is 320099209909. The next prime is 320099209943. The reversal of 320099209920 is 29902990023.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 7918809 + ... + 7959128.

Almost surely, 2^320099209920 is an apocalyptic number.

320099209920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320099209920 is an abundant number, since it is smaller than the sum of its proper divisors (938195620704).

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

320099209920 is a wasteful number, since it uses less digits than its factorization.

320099209920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15877967 (or 15877954 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 320099209920 in words is "three hundred twenty billion, ninety-nine million, two hundred nine thousand, nine hundred twenty".