20311455011 has 8 divisors (see below), whose sum is σ = 20350320144. Its totient is φ = 20272613760.

The previous prime is 20311454959. The next prime is 20311455013. The reversal of 20311455011 is 11055411302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311455011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311455013) 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, 3263975 + ... + 3270191.

It is an arithmetic number, because the mean of its divisors is an integer number (2543790018).

Almost surely, 2^20311455011 is an apocalyptic number.

20311455011 is a deficient number, since it is larger than the sum of its proper divisors (38865133).

20311455011 is an equidigital number, since it uses as much as digits as its factorization.

20311455011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11941.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20311455011 its reverse (11055411302), we get a palindrome (31366866313).

The spelling of 20311455011 in words is "twenty billion, three hundred eleven million, four hundred fifty-five thousand, eleven".