320021019 has 12 divisors (see below), whose sum is σ = 462583576. Its totient is φ = 213194592.

The previous prime is 320021017. The next prime is 320021027. The reversal of 320021019 is 910120023.

It is a happy number.

It is not a de Polignac number, because 320021019 - 2¹ = 320021017 is a prime.

It is a super-2 number, since 2×320021019² = 204826905203596722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320020992 and 320021010.

It is not an unprimeable number, because it can be changed into a prime (320021017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1359 + ... + 25335.

Almost surely, 2^320021019 is an apocalyptic number.

320021019 is a deficient number, since it is larger than the sum of its proper divisors (142562557).

320021019 is a wasteful number, since it uses less digits than its factorization.

320021019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25466 (or 25463 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 320021019 is about 17889.1313092615. The cubic root of 320021019 is about 684.0053541696.

The spelling of 320021019 in words is "three hundred twenty million, twenty-one thousand, nineteen".