20003505140 has 96 divisors (see below), whose sum is σ = 45144086400. Its totient is φ = 7422589440.

The previous prime is 20003505127. The next prime is 20003505227. The reversal of 20003505140 is 4150530002.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 6208730 + ... + 6211950.

It is an arithmetic number, because the mean of its divisors is an integer number (470250900).

Almost surely, 2^20003505140 is an apocalyptic number.

20003505140 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 20003505140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22572043200).

20003505140 is an abundant number, since it is smaller than the sum of its proper divisors (25140581260).

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

20003505140 is a wasteful number, since it uses less digits than its factorization.

20003505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585 (or 3583 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The spelling of 20003505140 in words is "twenty billion, three million, five hundred five thousand, one hundred forty".