20010451 has 4 divisors (see below), whose sum is σ = 20551312. Its totient is φ = 19469592.

The previous prime is 20010443. The next prime is 20010457. The reversal of 20010451 is 15401002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15401002 = 2 ⋅7700501.

It is a cyclic number.

It is not a de Polignac number, because 20010451 - 2³ = 20010443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270375 + ... + 270448.

It is an arithmetic number, because the mean of its divisors is an integer number (5137828).

Almost surely, 2^20010451 is an apocalyptic number.

20010451 is a deficient number, since it is larger than the sum of its proper divisors (540861).

20010451 is an equidigital number, since it uses as much as digits as its factorization.

20010451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540860.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20010451 is about 4473.3042597167. The cubic root of 20010451 is about 271.4890340572.

Adding to 20010451 its reverse (15401002), we get a palindrome (35411453).

The spelling of 20010451 in words is "twenty million, ten thousand, four hundred fifty-one".