20115100442 has 8 divisors (see below), whose sum is σ = 30330623232. Its totient is φ = 10004892700.

The previous prime is 20115100403. The next prime is 20115100483. The reversal of 20115100442 is 24400151102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 26328284 + ... + 26329047.

It is an arithmetic number, because the mean of its divisors is an integer number (3791327904).

Almost surely, 2^20115100442 is an apocalyptic number.

20115100442 is a deficient number, since it is larger than the sum of its proper divisors (10215522790).

20115100442 is a wasteful number, since it uses less digits than its factorization.

20115100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52657524.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20115100442 its reverse (24400151102), we get a palindrome (44515251544).

The spelling of 20115100442 in words is "twenty billion, one hundred fifteen million, one hundred thousand, four hundred forty-two".