20540212001 has 4 divisors (see below), whose sum is σ = 20569514004. Its totient is φ = 20510910000.

The previous prime is 20540211983. The next prime is 20540212009. The reversal of 20540212001 is 10021204502.

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 19161203776 + 1379008225 = 138424^2 + 37135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20540212001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20540212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14649950 + ... + 14651351.

It is an arithmetic number, because the mean of its divisors is an integer number (5142378501).

Almost surely, 2^20540212001 is an apocalyptic number.

It is an amenable number.

20540212001 is a deficient number, since it is larger than the sum of its proper divisors (29302003).

20540212001 is an equidigital number, since it uses as much as digits as its factorization.

20540212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29302002.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20540212001 its reverse (10021204502), we get a palindrome (30561416503).

The spelling of 20540212001 in words is "twenty billion, five hundred forty million, two hundred twelve thousand, one".