20360440 has 32 divisors (see below), whose sum is σ = 45956160. Its totient is φ = 8118400.

The previous prime is 20360423. The next prime is 20360449. The reversal of 20360440 is 4406302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20360449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16650 + ... + 17830.

It is an arithmetic number, because the mean of its divisors is an integer number (1436130).

Almost surely, 2^20360440 is an apocalyptic number.

20360440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20360440 is an abundant number, since it is smaller than the sum of its proper divisors (25595720).

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

20360440 is a wasteful number, since it uses less digits than its factorization.

20360440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20360440 is about 4512.2544254508. The cubic root of 20360440 is about 273.0627039122.

Adding to 20360440 its reverse (4406302), we get a palindrome (24766742).

The spelling of 20360440 in words is "twenty million, three hundred sixty thousand, four hundred forty".