20031331012 has 24 divisors (see below), whose sum is σ = 43704722880. Its totient is φ = 7804414560.

The previous prime is 20031331003. The next prime is 20031331031. The reversal of 20031331012 is 21013313002.

It is a super-2 number, since 2×20031331012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32518087 + ... + 32518702.

It is an arithmetic number, because the mean of its divisors is an integer number (1821030120).

Almost surely, 2^20031331012 is an apocalyptic number.

20031331012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20031331012 is an abundant number, since it is smaller than the sum of its proper divisors (23673391868).

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

20031331012 is a wasteful number, since it uses less digits than its factorization.

20031331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65036811 (or 65036809 counting only the distinct ones).

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

Adding to 20031331012 its reverse (21013313002), we get a palindrome (41044644014).

The spelling of 20031331012 in words is "twenty billion, thirty-one million, three hundred thirty-one thousand, twelve".