20031113034240 has 640 divisors, whose sum is σ = 84534706003968. Its totient is φ = 3917465518080.

The previous prime is 20031113034239. The next prime is 20031113034293. The reversal of 20031113034240 is 4243031113002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20031113034240.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9056857 + ... + 11049383.

Almost surely, 2^{20031113034240} is an apocalyptic number.

20031113034240 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 20031113034240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42267353001984).

20031113034240 is an abundant number, since it is smaller than the sum of its proper divisors (64503592969728).

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

20031113034240 is a wasteful number, since it uses less digits than its factorization.

20031113034240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992588 (or 1992572 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20031113034240 its reverse (4243031113002), we get a palindrome (24274144147242).

The spelling of 20031113034240 in words is "twenty trillion, thirty-one billion, one hundred thirteen million, thirty-four thousand, two hundred forty".