20311303012 has 288 divisors, whose sum is σ = 52381486080. Its totient is φ = 6751745280.

The previous prime is 20311303009. The next prime is 20311303039. The reversal of 20311303012 is 21030311302.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22898433 + ... + 22899319.

It is an arithmetic number, because the mean of its divisors is an integer number (181880160).

Almost surely, 2^20311303012 is an apocalyptic number.

20311303012 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 20311303012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26190743040).

20311303012 is an abundant number, since it is smaller than the sum of its proper divisors (32070183068).

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

20311303012 is a wasteful number, since it uses less digits than its factorization.

20311303012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20311303012 its reverse (21030311302), we get a palindrome (41341614314).

It can be divided in two parts, 20311 and 303012, that added together give a palindrome (323323).

The spelling of 20311303012 in words is "twenty billion, three hundred eleven million, three hundred three thousand, twelve".