20622001 has 2 divisors, whose sum is σ = 20622002. Its totient is φ = 20622000.

The previous prime is 20621999. The next prime is 20622023. The reversal of 20622001 is 10022602.

It is a happy number.

20622001 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1437601 = 4380^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20622001 - 2¹ = 20621999 is a prime.

Together with 20621999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20622401) 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 as a sum of consecutive naturals, namely, 10311000 + 10311001.

It is an arithmetic number, because the mean of its divisors is an integer number (10311001).

Almost surely, 2^20622001 is an apocalyptic number.

It is an amenable number.

20622001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20622001 is an equidigital number, since it uses as much as digits as its factorization.

20622001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20622001 is about 4541.1453401097. The cubic root of 20622001 is about 274.2270349088.

Adding to 20622001 its reverse (10022602), we get a palindrome (30644603).

The spelling of 20622001 in words is "twenty million, six hundred twenty-two thousand, one".