20133312240 has 160 divisors (see below), whose sum is σ = 63397567296. Its totient is φ = 5284823040.

The previous prime is 20133312233. The next prime is 20133312259. The reversal of 20133312240 is 4221333102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4490800 + ... + 4495280.

Almost surely, 2^20133312240 is an apocalyptic number.

20133312240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20133312240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31698783648).

20133312240 is an abundant number, since it is smaller than the sum of its proper divisors (43264255056).

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

20133312240 is a wasteful number, since it uses less digits than its factorization.

20133312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787 (or 4781 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20133312240 its reverse (4221333102), we get a palindrome (24354645342).

The spelling of 20133312240 in words is "twenty billion, one hundred thirty-three million, three hundred twelve thousand, two hundred forty".