201042420444 has 96 divisors (see below), whose sum is σ = 552220623360. Its totient is φ = 63033336576.

The previous prime is 201042420419. The next prime is 201042420463. The reversal of 201042420444 is 444024240102.

201042420444 is a `hidden beast` number, since 20 + 10 + 424 + 204 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3027769 + ... + 3093455.

It is an arithmetic number, because the mean of its divisors is an integer number (5752298160).

Almost surely, 2^201042420444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201042420444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276110311680).

201042420444 is an abundant number, since it is smaller than the sum of its proper divisors (351178202916).

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

201042420444 is a wasteful number, since it uses less digits than its factorization.

201042420444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67384 (or 67376 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 201042420444 its reverse (444024240102), we get a palindrome (645066660546).

The spelling of 201042420444 in words is "two hundred one billion, forty-two million, four hundred twenty thousand, four hundred forty-four".