20312331112 has 8 divisors (see below), whose sum is σ = 38085620850. Its totient is φ = 10156165552.

The previous prime is 20312331101. The next prime is 20312331131. The reversal of 20312331112 is 21113321302.

It can be written as a sum of positive squares in only one way, i.e., 20310240196 + 2090916 = 142514^2 + 1446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20312331112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269520687 + ... + 1269520702.

Almost surely, 2^20312331112 is an apocalyptic number.

It is an amenable number.

20312331112 is a deficient number, since it is larger than the sum of its proper divisors (17773289738).

20312331112 is a wasteful number, since it uses less digits than its factorization.

20312331112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539041395 (or 2539041391 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20312331112 its reverse (21113321302), we get a palindrome (41425652414).

The spelling of 20312331112 in words is "twenty billion, three hundred twelve million, three hundred thirty-one thousand, one hundred twelve".