20012021192 has 16 divisors (see below), whose sum is σ = 37526190540. Its totient is φ = 10005037056.

The previous prime is 20012021191. The next prime is 20012021203. The reversal of 20012021192 is 29112021002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20003576356 + 8444836 = 141434^2 + 2906^2 .

It is not an unprimeable number, because it can be changed into a prime (20012021191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30293 + ... + 202340.

Almost surely, 2^20012021192 is an apocalyptic number.

It is an amenable number.

20012021192 is a deficient number, since it is larger than the sum of its proper divisors (17514169348).

20012021192 is a wasteful number, since it uses less digits than its factorization.

20012021192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243392 (or 243388 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20012021192 its reverse (29112021002), we get a palindrome (49124042194).

The spelling of 20012021192 in words is "twenty billion, twelve million, twenty-one thousand, one hundred ninety-two".