201042020440 has 128 divisors (see below), whose sum is σ = 471637863360. Its totient is φ = 77056303104.

The previous prime is 201042020381. The next prime is 201042020471. The reversal of 201042020440 is 44020240102.

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, 121328092 + ... + 121329748.

Almost surely, 2^201042020440 is an apocalyptic number.

201042020440 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 201042020440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235818931680).

201042020440 is an abundant number, since it is smaller than the sum of its proper divisors (270595842920).

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

201042020440 is a wasteful number, since it uses less digits than its factorization.

201042020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901 (or 2897 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 201042020440 its reverse (44020240102), we get a palindrome (245062260542).

The spelling of 201042020440 in words is "two hundred one billion, forty-two million, twenty thousand, four hundred forty".