20052040 has 64 divisors (see below), whose sum is σ = 47324160. Its totient is φ = 7637760.

The previous prime is 20052037. The next prime is 20052059. The reversal of 20052040 is 4025002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20052040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127642 + ... + 127798.

It is an arithmetic number, because the mean of its divisors is an integer number (739440).

Almost surely, 2^20052040 is an apocalyptic number.

20052040 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 20052040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23662080).

20052040 is an abundant number, since it is smaller than the sum of its proper divisors (27272120).

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

20052040 is a wasteful number, since it uses less digits than its factorization.

20052040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20052040 is about 4477.9504240221. The cubic root of 20052040 is about 271.6769882454.

Adding to 20052040 its reverse (4025002), we get a palindrome (24077042).

The spelling of 20052040 in words is "twenty million, fifty-two thousand, forty".