20133444 has 12 divisors (see below), whose sum is σ = 46978064. Its totient is φ = 6711144.

The previous prime is 20133431. The next prime is 20133479. The reversal of 20133444 is 44433102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20133444² = 810711134602272, 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 20133444.

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, 838882 + ... + 838905.

Almost surely, 2^20133444 is an apocalyptic number.

It is an amenable number.

20133444 is an abundant number, since it is smaller than the sum of its proper divisors (26844620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20133444 is a wasteful number, since it uses less digits than its factorization.

20133444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677794 (or 1677792 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20133444 is about 4487.0306439783. The cubic root of 20133444 is about 272.0441285093.

Adding to 20133444 its reverse (44433102), we get a palindrome (64566546).

The spelling of 20133444 in words is "twenty million, one hundred thirty-three thousand, four hundred forty-four".