20311211104 has 48 divisors (see below), whose sum is σ = 40227470640. Its totient is φ = 10094837760.

The previous prime is 20311211083. The next prime is 20311211131. The reversal of 20311211104 is 40111211302.

It is a super-2 number, since 2×20311211104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7783752 + ... + 7786360.

It is an arithmetic number, because the mean of its divisors is an integer number (838072305).

Almost surely, 2^20311211104 is an apocalyptic number.

It is an amenable number.

20311211104 is a deficient number, since it is larger than the sum of its proper divisors (19916259536).

20311211104 is a wasteful number, since it uses less digits than its factorization.

20311211104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20311211104 its reverse (40111211302), we get a palindrome (60422422406).

The spelling of 20311211104 in words is "twenty billion, three hundred eleven million, two hundred eleven thousand, one hundred four".