20330230331 has 4 divisors (see below), whose sum is σ = 20527611312. Its totient is φ = 20132849352.

The previous prime is 20330230321. The next prime is 20330230339. The reversal of 20330230331 is 13303203302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13303203302 = 2 ⋅6651601651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330230331 is a prime.

It is a super-2 number, since 2×20330230331² (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 (20330230339) 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, 98690336 + ... + 98690541.

It is an arithmetic number, because the mean of its divisors is an integer number (5131902828).

Almost surely, 2^20330230331 is an apocalyptic number.

20330230331 is a deficient number, since it is larger than the sum of its proper divisors (197380981).

20330230331 is a wasteful number, since it uses less digits than its factorization.

20330230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197380980.

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 20330230331 its reverse (13303203302), we get a palindrome (33633433633).

The spelling of 20330230331 in words is "twenty billion, three hundred thirty million, two hundred thirty thousand, three hundred thirty-one".