20411442 has 48 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 6363456.

The previous prime is 20411431. The next prime is 20411473. The reversal of 20411442 is 24411402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18934 + ... + 19982.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^20411442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20411442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23587200).

20411442 is an abundant number, since it is smaller than the sum of its proper divisors (26762958).

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

20411442 is a wasteful number, since it uses less digits than its factorization.

20411442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20411442 is about 4517.9023893838. The cubic root of 20411442 is about 273.2905171218.

Adding to 20411442 its reverse (24411402), we get a palindrome (44822844).

The spelling of 20411442 in words is "twenty million, four hundred eleven thousand, four hundred forty-two".