299720017920 has 192 divisors, whose sum is σ = 962541740160. Its totient is φ = 79619293184.

The previous prime is 299720017873. The next prime is 299720017963. The reversal of 299720017920 is 29710027992.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×299720017920² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 299720017920.

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, 8060812 + ... + 8097908.

It is an arithmetic number, because the mean of its divisors is an integer number (5013238230).

Almost surely, 2^299720017920 is an apocalyptic number.

299720017920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 299720017920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481270870080).

299720017920 is an abundant number, since it is smaller than the sum of its proper divisors (662821722240).

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

299720017920 is a wasteful number, since it uses less digits than its factorization.

299720017920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37390 (or 37370 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The spelling of 299720017920 in words is "two hundred ninety-nine billion, seven hundred twenty million, seventeen thousand, nine hundred twenty".