319000020 has 96 divisors (see below), whose sum is σ = 918691200. Its totient is φ = 82673664.

The previous prime is 318999991. The next prime is 319000021. The reversal of 319000020 is 20000913.

It is a super-2 number, since 2×319000020² = 203522025520000800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342916 + ... + 343844.

It is an arithmetic number, because the mean of its divisors is an integer number (9569700).

Almost surely, 2^319000020 is an apocalyptic number.

319000020 is a gapful number since it is divisible by the number (30) 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 319000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459345600).

319000020 is an abundant number, since it is smaller than the sum of its proper divisors (599691180).

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

319000020 is a wasteful number, since it uses less digits than its factorization.

319000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 319000020 is about 17860.5716593843. The cubic root of 319000020 is about 683.2771595042.

Adding to 319000020 its reverse (20000913), we get a palindrome (339000933).

The spelling of 319000020 in words is "three hundred nineteen million, twenty", and thus it is an aban number.