20351450550 has 96 divisors (see below), whose sum is σ = 53640986400. Its totient is φ = 5088655360.

The previous prime is 20351450543. The next prime is 20351450569. The reversal of 20351450550 is 5505415302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671116 + ... + 700784.

It is an arithmetic number, because the mean of its divisors is an integer number (558760275).

Almost surely, 2^20351450550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20351450550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26820493200).

20351450550 is an abundant number, since it is smaller than the sum of its proper divisors (33289535850).

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

20351450550 is a wasteful number, since it uses less digits than its factorization.

20351450550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29970 (or 29965 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 20351450550 its reverse (5505415302), we get a palindrome (25856865852).

The spelling of 20351450550 in words is "twenty billion, three hundred fifty-one million, four hundred fifty thousand, five hundred fifty".