320000340021 has 32 divisors (see below), whose sum is σ = 475785446400. Its totient is φ = 190119663360.

The previous prime is 320000340017. The next prime is 320000340029. The reversal of 320000340021 is 120043000023.

It is not a de Polignac number, because 320000340021 - 2² = 320000340017 is a prime.

It is a super-2 number, since 2×320000340021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320000340029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1834216 + ... + 2001086.

It is an arithmetic number, because the mean of its divisors is an integer number (14868295200).

Almost surely, 2^320000340021 is an apocalyptic number.

It is an amenable number.

320000340021 is a deficient number, since it is larger than the sum of its proper divisors (155785106379).

320000340021 is a wasteful number, since it uses less digits than its factorization.

320000340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168889.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 320000340021 its reverse (120043000023), we get a palindrome (440043340044).

The spelling of 320000340021 in words is "three hundred twenty billion, three hundred forty thousand, twenty-one".