20312114550 has 288 divisors, whose sum is σ = 64462874112. Its totient is φ = 4193521920.

The previous prime is 20312114527. The next prime is 20312114561. The reversal of 20312114550 is 5541121302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312114550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4488589 + ... + 4493111.

It is an arithmetic number, because the mean of its divisors is an integer number (223829424).

Almost surely, 2^20312114550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312114550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32231437056).

20312114550 is an abundant number, since it is smaller than the sum of its proper divisors (44150759562).

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

20312114550 is a wasteful number, since it uses less digits than its factorization.

20312114550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612 (or 4600 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20312114550 its reverse (5541121302), we get a palindrome (25853235852).

The spelling of 20312114550 in words is "twenty billion, three hundred twelve million, one hundred fourteen thousand, five hundred fifty".