20545341101 has 4 divisors (see below), whose sum is σ = 20545791804. Its totient is φ = 20544890400.

The previous prime is 20545341067. The next prime is 20545341137. The reversal of 20545341101 is 10114354502.

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 15344767876 + 5200573225 = 123874^2 + 72115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20545341101 is a prime.

It is a super-2 number, since 2×20545341101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545341301) 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, 148160 + ... + 251081.

It is an arithmetic number, because the mean of its divisors is an integer number (5136447951).

Almost surely, 2^20545341101 is an apocalyptic number.

It is an amenable number.

20545341101 is a deficient number, since it is larger than the sum of its proper divisors (450703).

20545341101 is an equidigital number, since it uses as much as digits as its factorization.

20545341101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450702.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20545341101 its reverse (10114354502), we get a palindrome (30659695603).

The spelling of 20545341101 in words is "twenty billion, five hundred forty-five million, three hundred forty-one thousand, one hundred one".