20340331 has 8 divisors (see below), whose sum is σ = 22662144. Its totient is φ = 18097320.

The previous prime is 20340323. The next prime is 20340373. The reversal of 20340331 is 13304302.

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

It is a cyclic number.

It is not a de Polignac number, because 20340331 - 2³ = 20340323 is a prime.

It is a super-2 number, since 2×20340331² = 827458130379122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340301) 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, 19155 + ... + 20188.

It is an arithmetic number, because the mean of its divisors is an integer number (2832768).

Almost surely, 2^20340331 is an apocalyptic number.

20340331 is a deficient number, since it is larger than the sum of its proper divisors (2321813).

20340331 is a wasteful number, since it uses less digits than its factorization.

20340331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39401.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20340331 is about 4510.0256096834. The cubic root of 20340331 is about 272.9727774561.

Adding to 20340331 its reverse (13304302), we get a palindrome (33644633).

The spelling of 20340331 in words is "twenty million, three hundred forty thousand, three hundred thirty-one".