20310551311 has 4 divisors (see below), whose sum is σ = 20310840000. Its totient is φ = 20310262624.

The previous prime is 20310551299. The next prime is 20310551323. The reversal of 20310551311 is 11315501302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (20310551299) and next prime (20310551323).

It is a cyclic number.

It is not a de Polignac number, because 20310551311 - 2¹³ = 20310543119 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 (20310551351) 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, 37815 + ... + 205063.

It is an arithmetic number, because the mean of its divisors is an integer number (5077710000).

Almost surely, 2^20310551311 is an apocalyptic number.

20310551311 is a deficient number, since it is larger than the sum of its proper divisors (288689).

20310551311 is a wasteful number, since it uses less digits than its factorization.

20310551311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288688.

The product of its (nonzero) digits is 450, while the sum is 22.

The spelling of 20310551311 in words is "twenty billion, three hundred ten million, five hundred fifty-one thousand, three hundred eleven".