194021821002 has 16 divisors (see below), whose sum is σ = 388121140512. Its totient is φ = 64661023920.

The previous prime is 194021821001. The next prime is 194021821013. The reversal of 194021821002 is 200128120491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (194021821001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3196533 + ... + 3256664.

It is an arithmetic number, because the mean of its divisors is an integer number (24257571282).

Almost surely, 2^194021821002 is an apocalyptic number.

194021821002 is an abundant number, since it is smaller than the sum of its proper divisors (194099319510).

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

194021821002 is a wasteful number, since it uses less digits than its factorization.

194021821002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458213.

The product of its (nonzero) digits is 2304, while the sum is 30.

Adding to 194021821002 its reverse (200128120491), we get a palindrome (394149941493).

The spelling of 194021821002 in words is "one hundred ninety-four billion, twenty-one million, eight hundred twenty-one thousand, two".