20443134 has 16 divisors (see below), whose sum is σ = 41139072. Its totient is φ = 6772248.

The previous prime is 20443123. The next prime is 20443141. The reversal of 20443134 is 43134402.

It is a self number, because there is not a number n which added to its sum of digits gives 20443134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9474 + ... + 11429.

It is an arithmetic number, because the mean of its divisors is an integer number (2571192).

Almost surely, 2^20443134 is an apocalyptic number.

20443134 is an abundant number, since it is smaller than the sum of its proper divisors (20695938).

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

20443134 is a wasteful number, since it uses less digits than its factorization.

20443134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21071.

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

The square root of 20443134 is about 4521.4084088921. The cubic root of 20443134 is about 273.4318862673.

Adding to 20443134 its reverse (43134402), we get a palindrome (63577536).

The spelling of 20443134 in words is "twenty million, four hundred forty-three thousand, one hundred thirty-four".