20422651 has 2 divisors, whose sum is σ = 20422652. Its totient is φ = 20422650.

The previous prime is 20422637. The next prime is 20422657. The reversal of 20422651 is 15622402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20422651 - 2⁹ = 20422139 is a prime.

It is not a weakly prime, because it can be changed into another prime (20422657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211325 + 10211326.

It is an arithmetic number, because the mean of its divisors is an integer number (10211326).

Almost surely, 2^20422651 is an apocalyptic number.

20422651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422651 is an equidigital number, since it uses as much as digits as its factorization.

20422651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20422651 is about 4519.1427284387. The cubic root of 20422651 is about 273.3405340492.

The spelling of 20422651 in words is "twenty million, four hundred twenty-two thousand, six hundred fifty-one".