20133442 has 8 divisors (see below), whose sum is σ = 34514496. Its totient is φ = 8628612.

The previous prime is 20133431. The next prime is 20133479. The reversal of 20133442 is 24433102.

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

It is an unprimeable number.

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, 719038 + ... + 719065.

It is an arithmetic number, because the mean of its divisors is an integer number (4314312).

Almost surely, 2^20133442 is an apocalyptic number.

20133442 is a deficient number, since it is larger than the sum of its proper divisors (14381054).

20133442 is a wasteful number, since it uses less digits than its factorization.

20133442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438112.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20133442 is about 4487.0304211137. The cubic root of 20133442 is about 272.0441195013.

Adding to 20133442 its reverse (24433102), we get a palindrome (44566544).

The spelling of 20133442 in words is "twenty million, one hundred thirty-three thousand, four hundred forty-two".