20034040 has 64 divisors (see below), whose sum is σ = 49442400. Its totient is φ = 7260672.

The previous prime is 20034031. The next prime is 20034061. The reversal of 20034040 is 4043002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20034040.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 30354 + ... + 31006.

Almost surely, 2^20034040 is an apocalyptic number.

20034040 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 20034040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24721200).

20034040 is an abundant number, since it is smaller than the sum of its proper divisors (29408360).

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

20034040 is a wasteful number, since it uses less digits than its factorization.

20034040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20034040 is about 4475.9401247112. The cubic root of 20034040 is about 271.5956723333.

Adding to 20034040 its reverse (4043002), we get a palindrome (24077042).

The spelling of 20034040 in words is "twenty million, thirty-four thousand, forty".