20441866 has 4 divisors (see below), whose sum is σ = 30662802. Its totient is φ = 10220932.

The previous prime is 20441857. The next prime is 20441867. The reversal of 20441866 is 66814402.

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

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 772641 = 4435^2 + 879^2 .

It is not an unprimeable number, because it can be changed into a prime (20441867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110465 + ... + 5110468.

Almost surely, 2^20441866 is an apocalyptic number.

20441866 is a deficient number, since it is larger than the sum of its proper divisors (10220936).

20441866 is a wasteful number, since it uses less digits than its factorization.

20441866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220935.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20441866 is about 4521.2681849233. The cubic root of 20441866 is about 273.4262328810.

The spelling of 20441866 in words is "twenty million, four hundred forty-one thousand, eight hundred sixty-six".