20953830606871 has 4 divisors (see below), whose sum is σ = 21053137861144. Its totient is φ = 20854523352600.

The previous prime is 20953830606851. The next prime is 20953830606883. The reversal of 20953830606871 is 17860603835902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20953830606871 - 2⁷ = 20953830606743 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 (20953830606851) 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 3 ways as a sum of consecutive naturals, for example, 49653626820 + ... + 49653627241.

It is an arithmetic number, because the mean of its divisors is an integer number (5263284465286).

Almost surely, 2^{20953830606871} is an apocalyptic number.

20953830606871 is a deficient number, since it is larger than the sum of its proper divisors (99307254273).

20953830606871 is an equidigital number, since it uses as much as digits as its factorization.

20953830606871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99307254272.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 20953830606871 in words is "twenty trillion, nine hundred fifty-three billion, eight hundred thirty million, six hundred six thousand, eight hundred seventy-one".