20312115444 has 96 divisors (see below), whose sum is σ = 53307578240. Its totient is φ = 6687857664.

The previous prime is 20312115427. The next prime is 20312115451. The reversal of 20312115444 is 44451121302.

20312115444 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 211 + 5 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6420207 + ... + 6423369.

Almost surely, 2^20312115444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312115444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26653789120).

20312115444 is an abundant number, since it is smaller than the sum of its proper divisors (32995462796).

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

20312115444 is a wasteful number, since it uses less digits than its factorization.

20312115444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886 (or 3878 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20312115444 its reverse (44451121302), we get a palindrome (64763236746).

The spelling of 20312115444 in words is "twenty billion, three hundred twelve million, one hundred fifteen thousand, four hundred forty-four".