20222641 has 4 divisors (see below), whose sum is σ = 20325492. Its totient is φ = 20119792.

The previous prime is 20222621. The next prime is 20222689. The reversal of 20222641 is 14622202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16982641 + 3240000 = 4121^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222641 - 2¹¹ = 20220593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222611) 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, 51130 + ... + 51523.

It is an arithmetic number, because the mean of its divisors is an integer number (5081373).

Almost surely, 2^20222641 is an apocalyptic number.

It is an amenable number.

20222641 is a deficient number, since it is larger than the sum of its proper divisors (102851).

20222641 is a wasteful number, since it uses less digits than its factorization.

20222641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102850.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20222641 is about 4496.9590836475. The cubic root of 20222641 is about 272.4452814970.

Adding to 20222641 its reverse (14622202), we get a palindrome (34844843).

The spelling of 20222641 in words is "twenty million, two hundred twenty-two thousand, six hundred forty-one".