20819506101 has 32 divisors (see below), whose sum is σ = 30183014400. Its totient is φ = 12716533440.

The previous prime is 20819506079. The next prime is 20819506111. The reversal of 20819506101 is 10160591802.

It is not a de Polignac number, because 20819506101 - 2¹⁷ = 20819375029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20819506111) 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 31 ways as a sum of consecutive naturals, for example, 3582340 + ... + 3588146.

It is an arithmetic number, because the mean of its divisors is an integer number (943219200).

Almost surely, 2^20819506101 is an apocalyptic number.

It is an amenable number.

20819506101 is a deficient number, since it is larger than the sum of its proper divisors (9363508299).

20819506101 is a wasteful number, since it uses less digits than its factorization.

20819506101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889.

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 20819506101 in words is "twenty billion, eight hundred nineteen million, five hundred six thousand, one hundred one".