20622081 has 8 divisors (see below), whose sum is σ = 27844480. Its totient is φ = 13573872.

The previous prime is 20622073. The next prime is 20622083. The reversal of 20622081 is 18022602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20622081 - 2³ = 20622073 is a prime.

It is a super-2 number, since 2×20622081² = 850540449541122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20622083) 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 in 7 ways as a sum of consecutive naturals, for example, 43270 + ... + 43743.

It is an arithmetic number, because the mean of its divisors is an integer number (3480560).

Almost surely, 2^20622081 is an apocalyptic number.

It is an amenable number.

20622081 is a deficient number, since it is larger than the sum of its proper divisors (7222399).

20622081 is an equidigital number, since it uses as much as digits as its factorization.

20622081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87095.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20622081 is about 4541.1541484517. The cubic root of 20622081 is about 274.2273895160.

Adding to 20622081 its reverse (18022602), we get a palindrome (38644683).

The spelling of 20622081 in words is "twenty million, six hundred twenty-two thousand, eighty-one".