20330002331 has 4 divisors (see below), whose sum is σ = 20616340464. Its totient is φ = 20043664200.

The previous prime is 20330002291. The next prime is 20330002367. The reversal of 20330002331 is 13320003302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330002331 is a prime.

It is a super-2 number, since 2×20330002331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20330002631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143168960 + ... + 143169101.

It is an arithmetic number, because the mean of its divisors is an integer number (5154085116).

Almost surely, 2^20330002331 is an apocalyptic number.

20330002331 is a deficient number, since it is larger than the sum of its proper divisors (286338133).

20330002331 is an equidigital number, since it uses as much as digits as its factorization.

20330002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286338132.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 20330002331 its reverse (13320003302), we get a palindrome (33650005633).

The spelling of 20330002331 in words is "twenty billion, three hundred thirty million, two thousand, three hundred thirty-one".