320021679351 has 16 divisors (see below), whose sum is σ = 465846703488. Its totient is φ = 193802272800.

The previous prime is 320021679337. The next prime is 320021679359. The reversal of 320021679351 is 153976120023.

It is a happy number.

It is not a de Polignac number, because 320021679351 - 2⁵ = 320021679319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320021679359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3713256 + ... + 3798461.

It is an arithmetic number, because the mean of its divisors is an integer number (29115418968).

Almost surely, 2^320021679351 is an apocalyptic number.

320021679351 is a deficient number, since it is larger than the sum of its proper divisors (145825024137).

320021679351 is a wasteful number, since it uses less digits than its factorization.

320021679351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513022.

The product of its (nonzero) digits is 68040, while the sum is 39.

Adding to 320021679351 its reverse (153976120023), we get a palindrome (473997799374).

The spelling of 320021679351 in words is "three hundred twenty billion, twenty-one million, six hundred seventy-nine thousand, three hundred fifty-one".