20533246 has 8 divisors (see below), whose sum is σ = 32611680. Its totient is φ = 9662688.

The previous prime is 20533241. The next prime is 20533267. The reversal of 20533246 is 64233502.

It is a happy number.

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

It is a super-2 number, since 2×20533246² = 843228382593032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301926 + ... + 301993.

It is an arithmetic number, because the mean of its divisors is an integer number (4076460).

Almost surely, 2^20533246 is an apocalyptic number.

20533246 is a deficient number, since it is larger than the sum of its proper divisors (12078434).

20533246 is a wasteful number, since it uses less digits than its factorization.

20533246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603938.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20533246 is about 4531.3624882589. The cubic root of 20533246 is about 273.8330540374.

Adding to 20533246 its reverse (64233502), we get a palindrome (84766748).

The spelling of 20533246 in words is "twenty million, five hundred thirty-three thousand, two hundred forty-six".