20542435201 has 4 divisors (see below), whose sum is σ = 20930028372. Its totient is φ = 20154842032.

The previous prime is 20542435189. The next prime is 20542435223. The reversal of 20542435201 is 10253424502.

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 15568800625 + 4973634576 = 124775^2 + 70524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20542435201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20542435201.

It is not an unprimeable number, because it can be changed into a prime (20542435241) 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, 193796506 + ... + 193796611.

It is an arithmetic number, because the mean of its divisors is an integer number (5232507093).

Almost surely, 2^20542435201 is an apocalyptic number.

It is an amenable number.

20542435201 is a deficient number, since it is larger than the sum of its proper divisors (387593171).

20542435201 is an equidigital number, since it uses as much as digits as its factorization.

20542435201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387593170.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20542435201 its reverse (10253424502), we get a palindrome (30795859703).

The spelling of 20542435201 in words is "twenty billion, five hundred forty-two million, four hundred thirty-five thousand, two hundred one".