20540251101 has 16 divisors (see below), whose sum is σ = 27486950400. Its totient is φ = 13643610288.

The previous prime is 20540251097. The next prime is 20540251111. The reversal of 20540251101 is 10115204502.

It is not a de Polignac number, because 20540251101 - 2² = 20540251097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540251111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029660 + ... + 1049418.

It is an arithmetic number, because the mean of its divisors is an integer number (1717934400).

Almost surely, 2^20540251101 is an apocalyptic number.

It is an amenable number.

20540251101 is a deficient number, since it is larger than the sum of its proper divisors (6946699299).

20540251101 is a wasteful number, since it uses less digits than its factorization.

20540251101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21008.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20540251101 its reverse (10115204502), we get a palindrome (30655455603).

The spelling of 20540251101 in words is "twenty billion, five hundred forty million, two hundred fifty-one thousand, one hundred one".