20000451 has 8 divisors (see below), whose sum is σ = 27170640. Its totient is φ = 13081952.

The previous prime is 20000443. The next prime is 20000471. The reversal of 20000451 is 15400002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20000451 - 2³ = 20000443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20000471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62736 + ... + 63053.

It is an arithmetic number, because the mean of its divisors is an integer number (3396330).

Almost surely, 2^20000451 is an apocalyptic number.

20000451 is a deficient number, since it is larger than the sum of its proper divisors (7170189).

20000451 is a wasteful number, since it uses less digits than its factorization.

20000451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125845.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20000451 is about 4472.1863780482. The cubic root of 20000451 is about 271.4438019814.

Adding to 20000451 its reverse (15400002), we get a palindrome (35400453).

The spelling of 20000451 in words is "twenty million, four hundred fifty-one", and thus it is an aban number.