20250040 has 16 divisors (see below), whose sum is σ = 45562680. Its totient is φ = 8100000.

The previous prime is 20250031. The next prime is 20250047. The reversal of 20250040 is 4005202.

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 20250040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20250047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253086 + ... + 253165.

Almost surely, 2^20250040 is an apocalyptic number.

20250040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20250040 is an abundant number, since it is smaller than the sum of its proper divisors (25312640).

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

20250040 is a wasteful number, since it uses less digits than its factorization.

20250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506262 (or 506258 counting only the distinct ones).

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

The square root of 20250040 is about 4500.0044444422. The cubic root of 20250040 is about 272.5682683934.

Adding to 20250040 its reverse (4005202), we get a palindrome (24255242).

The spelling of 20250040 in words is "twenty million, two hundred fifty thousand, forty".