20025040 has 40 divisors (see below), whose sum is σ = 53210880. Its totient is φ = 6865536.

The previous prime is 20025037. The next prime is 20025041. The reversal of 20025040 is 4052002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20025040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17320 + ... + 18439.

It is an arithmetic number, because the mean of its divisors is an integer number (1330272).

Almost surely, 2^20025040 is an apocalyptic number.

20025040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20025040 is an abundant number, since it is smaller than the sum of its proper divisors (33185840).

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

20025040 is a wasteful number, since it uses less digits than its factorization.

20025040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35779 (or 35773 counting only the distinct ones).

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

The square root of 20025040 is about 4474.9346363941. The cubic root of 20025040 is about 271.5549961113.

Adding to 20025040 its reverse (4052002), we get a palindrome (24077042).

The spelling of 20025040 in words is "twenty million, twenty-five thousand, forty".