20110440 has 128 divisors (see below), whose sum is σ = 69984000. Its totient is φ = 4528128.

The previous prime is 20110429. The next prime is 20110481. The reversal of 20110440 is 4401102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74626 + ... + 74894.

It is an arithmetic number, because the mean of its divisors is an integer number (546750).

Almost surely, 2^20110440 is an apocalyptic number.

20110440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34992000).

20110440 is an abundant number, since it is smaller than the sum of its proper divisors (49873560).

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

20110440 is a wasteful number, since it uses less digits than its factorization.

20110440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20110440 is about 4484.4665234563. The cubic root of 20110440 is about 271.9404786138.

Adding to 20110440 its reverse (4401102), we get a palindrome (24511542).

The spelling of 20110440 in words is "twenty million, one hundred ten thousand, four hundred forty".