20113344442 has 4 divisors (see below), whose sum is σ = 30170016666. Its totient is φ = 10056672220.

The previous prime is 20113344431. The next prime is 20113344443. The reversal of 20113344442 is 24444331102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24444331102 = 2 ⋅12222165551.

It can be written as a sum of positive squares in only one way, i.e., 12523624281 + 7589720161 = 111909^2 + 87119^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20113344442.

It is not an unprimeable number, because it can be changed into a prime (20113344443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5028336109 + ... + 5028336112.

Almost surely, 2^20113344442 is an apocalyptic number.

20113344442 is a deficient number, since it is larger than the sum of its proper divisors (10056672224).

20113344442 is a wasteful number, since it uses less digits than its factorization.

20113344442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056672223.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20113344442 its reverse (24444331102), we get a palindrome (44557675544).

The spelling of 20113344442 in words is "twenty billion, one hundred thirteen million, three hundred forty-four thousand, four hundred forty-two".