20206110641 has 4 divisors (see below), whose sum is σ = 20206568484. Its totient is φ = 20205652800.

The previous prime is 20206110637. The next prime is 20206110653. The reversal of 20206110641 is 14601160202.

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 3960059041 + 16246051600 = 62929^2 + 127460^2 .

It is a cyclic number.

It is not a de Polignac number, because 20206110641 - 2² = 20206110637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20206110541) 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, 154700 + ... + 253661.

It is an arithmetic number, because the mean of its divisors is an integer number (5051642121).

Almost surely, 2^20206110641 is an apocalyptic number.

It is an amenable number.

20206110641 is a deficient number, since it is larger than the sum of its proper divisors (457843).

20206110641 is an equidigital number, since it uses as much as digits as its factorization.

20206110641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457842.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20206110641 its reverse (14601160202), we get a palindrome (34807270843).

The spelling of 20206110641 in words is "twenty billion, two hundred six million, one hundred ten thousand, six hundred forty-one".