20311211103 has 16 divisors (see below), whose sum is σ = 27529894656. Its totient is φ = 13318497920.

The previous prime is 20311211083. The next prime is 20311211131. The reversal of 20311211103 is 30111211302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20311211103 - 2¹³ = 20311202911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311211303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184275 + ... + 273092.

It is an arithmetic number, because the mean of its divisors is an integer number (1720618416).

Almost surely, 2^20311211103 is an apocalyptic number.

20311211103 is a deficient number, since it is larger than the sum of its proper divisors (7218683553).

20311211103 is a wasteful number, since it uses less digits than its factorization.

20311211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457614.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20311211103 its reverse (30111211302), we get a palindrome (50422422405).

The spelling of 20311211103 in words is "twenty billion, three hundred eleven million, two hundred eleven thousand, one hundred three".