820019319 has 8 divisors (see below), whose sum is σ = 1249553280. Its totient is φ = 468582456.

The previous prime is 820019281. The next prime is 820019323. The reversal of 820019319 is 913910028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820019319 - 2¹¹ = 820017271 is a prime.

It is a super-2 number, since 2×820019319² = 1344863367066447522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 820019319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820019329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19524249 + ... + 19524290.

It is an arithmetic number, because the mean of its divisors is an integer number (156194160).

Almost surely, 2^820019319 is an apocalyptic number.

820019319 is a deficient number, since it is larger than the sum of its proper divisors (429533961).

820019319 is a wasteful number, since it uses less digits than its factorization.

820019319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39048549.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 820019319 is about 28635.9794489380. The cubic root of 820019319 is about 935.9975128230.

The spelling of 820019319 in words is "eight hundred twenty million, nineteen thousand, three hundred nineteen".