20204111312 has 160 divisors (see below), whose sum is σ = 51874608384. Its totient is φ = 7380172800.

The previous prime is 20204111309. The next prime is 20204111321. The reversal of 20204111312 is 21311140202.

It is a super-2 number, since 2×20204111312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5883548 + ... + 5886980.

Almost surely, 2^20204111312 is an apocalyptic number.

20204111312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20204111312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25937304192).

20204111312 is an abundant number, since it is smaller than the sum of its proper divisors (31670497072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20204111312 is a wasteful number, since it uses less digits than its factorization.

20204111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757 (or 3751 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20204111312 its reverse (21311140202), we get a palindrome (41515251514).

The spelling of 20204111312 in words is "twenty billion, two hundred four million, one hundred eleven thousand, three hundred twelve".