20106451 has 8 divisors (see below), whose sum is σ = 20702304. Its totient is φ = 19518720.

The previous prime is 20106421. The next prime is 20106469. The reversal of 20106451 is 15460102.

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 20106451 - 2¹³ = 20098259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20106421) 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 7 ways as a sum of consecutive naturals, for example, 3186 + ... + 7096.

It is an arithmetic number, because the mean of its divisors is an integer number (2587788).

Almost surely, 2^20106451 is an apocalyptic number.

20106451 is a deficient number, since it is larger than the sum of its proper divisors (595853).

20106451 is an equidigital number, since it uses as much as digits as its factorization.

20106451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20106451 is about 4484.0217439259. The cubic root of 20106451 is about 271.9224972022.

Adding to 20106451 its reverse (15460102), we get a palindrome (35566553).

The spelling of 20106451 in words is "twenty million, one hundred six thousand, four hundred fifty-one".