20463451 has 2 divisors, whose sum is σ = 20463452. Its totient is φ = 20463450.

The previous prime is 20463409. The next prime is 20463463. The reversal of 20463451 is 15436402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20463451 - 2¹⁹ = 19939163 is a prime.

It is not a weakly prime, because it can be changed into another prime (20463251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10231725 + 10231726.

It is an arithmetic number, because the mean of its divisors is an integer number (10231726).

Almost surely, 2^20463451 is an apocalyptic number.

20463451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20463451 is an equidigital number, since it uses as much as digits as its factorization.

20463451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20463451 is about 4523.6546066206. The cubic root of 20463451 is about 273.5224378808.

Adding to 20463451 its reverse (15436402), we get a palindrome (35899853).

The spelling of 20463451 in words is "twenty million, four hundred sixty-three thousand, four hundred fifty-one".