20442434101 has 4 divisors (see below), whose sum is σ = 20447355852. Its totient is φ = 20437512352.

The previous prime is 20442434099. The next prime is 20442434137. The reversal of 20442434101 is 10143424402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10143424402 = 2 ⋅5071712201.

It can be written as a sum of positive squares in 2 ways, for example, as 15983533476 + 4458900625 = 126426^2 + 66775^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442434101 - 2¹ = 20442434099 is a prime.

It is a super-2 number, since 2×20442434101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442434171) 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, 2454640 + ... + 2462953.

It is an arithmetic number, because the mean of its divisors is an integer number (5111838963).

Almost surely, 2^20442434101 is an apocalyptic number.

It is an amenable number.

20442434101 is a deficient number, since it is larger than the sum of its proper divisors (4921751).

20442434101 is an equidigital number, since it uses as much as digits as its factorization.

20442434101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921750.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20442434101 its reverse (10143424402), we get a palindrome (30585858503).

The spelling of 20442434101 in words is "twenty billion, four hundred forty-two million, four hundred thirty-four thousand, one hundred one".