20040450 has 96 divisors (see below), whose sum is σ = 54639360. Its totient is φ = 4838400.

The previous prime is 20040443. The next prime is 20040463. The reversal of 20040450 is 5404002.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 73815 + ... + 74085.

It is an arithmetic number, because the mean of its divisors is an integer number (569160).

Almost surely, 2^20040450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20040450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27319680).

20040450 is an abundant number, since it is smaller than the sum of its proper divisors (34598910).

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

20040450 is a wasteful number, since it uses less digits than its factorization.

20040450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20040450 is about 4476.6561181310. The cubic root of 20040450 is about 271.6246354151.

Adding to 20040450 its reverse (5404002), we get a palindrome (25444452).

The spelling of 20040450 in words is "twenty million, forty thousand, four hundred fifty".