20022641 has 4 divisors (see below), whose sum is σ = 20031984. Its totient is φ = 20013300.

The previous prime is 20022631. The next prime is 20022677. The reversal of 20022641 is 14622002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20022641 - 2⁶ = 20022577 is a prime.

It is a super-2 number, since 2×20022641² = 801812305229762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022631) 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 3 ways as a sum of consecutive naturals, for example, 326 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (5007996).

Almost surely, 2^20022641 is an apocalyptic number.

It is an amenable number.

20022641 is a deficient number, since it is larger than the sum of its proper divisors (9343).

20022641 is an equidigital number, since it uses as much as digits as its factorization.

20022641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20022641 is about 4474.6665797576. Note that the first 3 decimals coincide. The cubic root of 20022641 is about 271.5441515811.

Adding to 20022641 its reverse (14622002), we get a palindrome (34644643).

The spelling of 20022641 in words is "twenty million, twenty-two thousand, six hundred forty-one".