20411490 has 48 divisors (see below), whose sum is σ = 53855424. Its totient is φ = 4947360.

The previous prime is 20411473. The next prime is 20411497. The reversal of 20411490 is 9411402.

It is not an unprimeable number, because it can be changed into a prime (20411497) by changing a digit.

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, 819 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (1121988).

Almost surely, 2^20411490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20411490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26927712).

20411490 is an abundant number, since it is smaller than the sum of its proper divisors (33443934).

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

20411490 is a wasteful number, since it uses less digits than its factorization.

20411490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5655 (or 5644 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20411490 is about 4517.9077015805. The cubic root of 20411490 is about 273.2907313470.

Adding to 20411490 its reverse (9411402), we get a palindrome (29822892).

The spelling of 20411490 in words is "twenty million, four hundred eleven thousand, four hundred ninety".