20001451 has 2 divisors, whose sum is σ = 20001452. Its totient is φ = 20001450.

The previous prime is 20001439. The next prime is 20001491. The reversal of 20001451 is 15410002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001451 - 2¹⁹ = 19477163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20001491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000725 + 10000726.

It is an arithmetic number, because the mean of its divisors is an integer number (10000726).

Almost surely, 2^20001451 is an apocalyptic number.

20001451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001451 is an equidigital number, since it uses as much as digits as its factorization.

20001451 is an evil number, because the sum of its binary digits is even.

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

The square root of 20001451 is about 4472.2981787891. The cubic root of 20001451 is about 271.4483258674.

Adding to 20001451 its reverse (15410002), we get a palindrome (35411453).

The spelling of 20001451 in words is "twenty million, one thousand, four hundred fifty-one".