20054651 has 2 divisors, whose sum is σ = 20054652. Its totient is φ = 20054650.

The previous prime is 20054647. The next prime is 20054669. The reversal of 20054651 is 15645002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20054651 - 2² = 20054647 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20054681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027325 + 10027326.

It is an arithmetic number, because the mean of its divisors is an integer number (10027326).

Almost surely, 2^20054651 is an apocalyptic number.

20054651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20054651 is an equidigital number, since it uses as much as digits as its factorization.

20054651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20054651 is about 4478.2419541601. The cubic root of 20054651 is about 271.6887795283.

Adding to 20054651 its reverse (15645002), we get a palindrome (35699653).

The spelling of 20054651 in words is "twenty million, fifty-four thousand, six hundred fifty-one".