20811705101 has 8 divisors (see below), whose sum is σ = 22743033024. Its totient is φ = 18886936320.

The previous prime is 20811705049. The next prime is 20811705113. The reversal of 20811705101 is 10150711802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20811705101 - 2⁶ = 20811705037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20811705121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633145 + ... + 1645838.

It is an arithmetic number, because the mean of its divisors is an integer number (2842879128).

Almost surely, 2^20811705101 is an apocalyptic number.

It is an amenable number.

20811705101 is a deficient number, since it is larger than the sum of its proper divisors (1931327923).

20811705101 is a wasteful number, since it uses less digits than its factorization.

20811705101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279571.

The product of its (nonzero) digits is 560, while the sum is 26.

The spelling of 20811705101 in words is "twenty billion, eight hundred eleven million, seven hundred five thousand, one hundred one".