20443460 has 24 divisors (see below), whose sum is σ = 43201536. Its totient is φ = 8125920.

The previous prime is 20443459. The next prime is 20443523. The reversal of 20443460 is 6434402.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 125 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (1800064).

Almost surely, 2^20443460 is an apocalyptic number.

20443460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20443460 is an abundant number, since it is smaller than the sum of its proper divisors (22758076).

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

20443460 is a wasteful number, since it uses less digits than its factorization.

20443460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443 (or 6441 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 20443460 is about 4521.4444594620. Note that the first 4 decimals coincide. The cubic root of 20443460 is about 273.4333397027.

Adding to 20443460 its reverse (6434402), we get a palindrome (26877862).

The spelling of 20443460 in words is "twenty million, four hundred forty-three thousand, four hundred sixty".