20040453 has 12 divisors (see below), whose sum is σ = 30019808. Its totient is φ = 13360140.

The previous prime is 20040443. The next prime is 20040463. The reversal of 20040453 is 35404002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20040443) and next prime (20040463).

It is not a de Polignac number, because 20040453 - 2⁸ = 20040197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40993 + ... + 41478.

Almost surely, 2^20040453 is an apocalyptic number.

It is an amenable number.

20040453 is a deficient number, since it is larger than the sum of its proper divisors (9979355).

20040453 is an frugal number, since it uses more digits than its factorization.

20040453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82486 (or 82474 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20040453 is about 4476.6564532025. The cubic root of 20040453 is about 271.6246489689.

Adding to 20040453 its reverse (35404002), we get a palindrome (55444455).

The spelling of 20040453 in words is "twenty million, forty thousand, four hundred fifty-three".