20333231340 has 48 divisors (see below), whose sum is σ = 57734933760. Its totient is φ = 5345824960.

The previous prime is 20333231333. The next prime is 20333231357. The reversal of 20333231340 is 4313233302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20333231340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2382270 + ... + 2390789.

It is an arithmetic number, because the mean of its divisors is an integer number (1202811120).

Almost surely, 2^20333231340 is an apocalyptic number.

20333231340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20333231340 is an abundant number, since it is smaller than the sum of its proper divisors (37401702420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20333231340 is a wasteful number, since it uses less digits than its factorization.

20333231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773142 (or 4773140 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 20333231340 its reverse (4313233302), we get a palindrome (24646464642).

The spelling of 20333231340 in words is "twenty billion, three hundred thirty-three million, two hundred thirty-one thousand, three hundred forty".