20011311345 has 16 divisors (see below), whose sum is σ = 33410189952. Its totient is φ = 10208668800.

The previous prime is 20011311289. The next prime is 20011311373. The reversal of 20011311345 is 54311311002.

It is not a de Polignac number, because 20011311345 - 2¹⁶ = 20011245809 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, 29001556 + ... + 29002245.

It is an arithmetic number, because the mean of its divisors is an integer number (2088136872).

Almost surely, 2^20011311345 is an apocalyptic number.

It is an amenable number.

20011311345 is a deficient number, since it is larger than the sum of its proper divisors (13398878607).

20011311345 is a wasteful number, since it uses less digits than its factorization.

20011311345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58003832.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20011311345 its reverse (54311311002), we get a palindrome (74322622347).

The spelling of 20011311345 in words is "twenty billion, eleven million, three hundred eleven thousand, three hundred forty-five".