20450321416 has 64 divisors (see below), whose sum is σ = 44525306880. Its totient is φ = 8624266560.

The previous prime is 20450321389. The next prime is 20450321417. The reversal of 20450321416 is 61412305402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20450321417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2170171 + ... + 2179573.

It is an arithmetic number, because the mean of its divisors is an integer number (695707920).

Almost surely, 2^20450321416 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 20450321416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22262653440).

20450321416 is an abundant number, since it is smaller than the sum of its proper divisors (24074985464).

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

20450321416 is a wasteful number, since it uses less digits than its factorization.

20450321416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10034 (or 10030 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20450321416 its reverse (61412305402), we get a palindrome (81862626818).

The spelling of 20450321416 in words is "twenty billion, four hundred fifty million, three hundred twenty-one thousand, four hundred sixteen".