201042020394 has 12 divisors (see below), whose sum is σ = 435591044226. Its totient is φ = 67014006792.

The previous prime is 201042020381. The next prime is 201042020471. The reversal of 201042020394 is 493020240102.

201042020394 is a `hidden beast` number, since 20 + 10 + 420 + 203 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 111230921169 + 89811099225 = 333513^2 + 299685^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5584500549 + ... + 5584500584.

Almost surely, 2^201042020394 is an apocalyptic number.

201042020394 is an abundant number, since it is smaller than the sum of its proper divisors (234549023832).

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

201042020394 is a wasteful number, since it uses less digits than its factorization.

201042020394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169001141 (or 11169001138 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 201042020394 its reverse (493020240102), we get a palindrome (694062260496).

The spelling of 201042020394 in words is "two hundred one billion, forty-two million, twenty thousand, three hundred ninety-four".