20311113345 has 16 divisors (see below), whose sum is σ = 32505205632. Its totient is φ = 10830119040.

The previous prime is 20311113313. The next prime is 20311113359. The reversal of 20311113345 is 54331111302.

It is not a de Polignac number, because 20311113345 - 2⁵ = 20311113313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85837 + ... + 219066.

It is an arithmetic number, because the mean of its divisors is an integer number (2031575352).

Almost surely, 2^20311113345 is an apocalyptic number.

It is an amenable number.

20311113345 is a deficient number, since it is larger than the sum of its proper divisors (12194092287).

20311113345 is a wasteful number, since it uses less digits than its factorization.

20311113345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309352.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 20311113345 its reverse (54331111302), we get a palindrome (74642224647).

The spelling of 20311113345 in words is "twenty billion, three hundred eleven million, one hundred thirteen thousand, three hundred forty-five".