20133239 has 8 divisors (see below), whose sum is σ = 23238048. Its totient is φ = 17085600.

The previous prime is 20133199. The next prime is 20133247. The reversal of 20133239 is 93233102.

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

It is not a de Polignac number, because 20133239 - 2¹² = 20129143 is a prime.

It is a super-2 number, since 2×20133239² = 810694625262242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13532 + ... + 14945.

It is an arithmetic number, because the mean of its divisors is an integer number (2904756).

Almost surely, 2^20133239 is an apocalyptic number.

20133239 is a deficient number, since it is larger than the sum of its proper divisors (3104809).

20133239 is a wasteful number, since it uses less digits than its factorization.

20133239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28585.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20133239 is about 4487.0078003052. The cubic root of 20133239 is about 272.0432051827.

The spelling of 20133239 in words is "twenty million, one hundred thirty-three thousand, two hundred thirty-nine".