20115420841 has 4 divisors (see below), whose sum is σ = 20173058500. Its totient is φ = 20057783184.

The previous prime is 20115420827. The next prime is 20115420893. The reversal of 20115420841 is 14802451102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16868814400 + 3246606441 = 129880^2 + 56979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20115420841 is a prime.

It is a super-2 number, since 2×20115420841² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115420641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28818306 + ... + 28819003.

It is an arithmetic number, because the mean of its divisors is an integer number (5043264625).

Almost surely, 2^20115420841 is an apocalyptic number.

It is an amenable number.

20115420841 is a deficient number, since it is larger than the sum of its proper divisors (57637659).

20115420841 is an equidigital number, since it uses as much as digits as its factorization.

20115420841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57637658.

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 20115420841 its reverse (14802451102), we get a palindrome (34917871943).

The spelling of 20115420841 in words is "twenty billion, one hundred fifteen million, four hundred twenty thousand, eight hundred forty-one".