20450346 has 64 divisors (see below), whose sum is σ = 50304000. Its totient is φ = 5524848.

The previous prime is 20450329. The next prime is 20450351. The reversal of 20450346 is 64305402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38841 + ... + 39363.

It is an arithmetic number, because the mean of its divisors is an integer number (786000).

Almost surely, 2^20450346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20450346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25152000).

20450346 is an abundant number, since it is smaller than the sum of its proper divisors (29853654).

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

20450346 is a wasteful number, since it uses less digits than its factorization.

20450346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20450346 is about 4522.2058776663. The cubic root of 20450346 is about 273.4640365713.

Adding to 20450346 its reverse (64305402), we get a palindrome (84755748).

The spelling of 20450346 in words is "twenty million, four hundred fifty thousand, three hundred forty-six".