20025140 has 24 divisors (see below), whose sum is σ = 43190952. Its totient is φ = 7793280.

The previous prime is 20025139. The next prime is 20025151. The reversal of 20025140 is 4152002.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 17875984 = 1466^2 + 4228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12791 + ... + 14270.

It is an arithmetic number, because the mean of its divisors is an integer number (1799623).

Almost surely, 2^20025140 is an apocalyptic number.

20025140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20025140 is an abundant number, since it is smaller than the sum of its proper divisors (23165812).

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

20025140 is a wasteful number, since it uses less digits than its factorization.

20025140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27107 (or 27105 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20025140 is about 4474.9458097278. The cubic root of 20025140 is about 271.5554481363. Note that the first 3 decimals are identical.

Adding to 20025140 its reverse (4152002), we get a palindrome (24177142).

The spelling of 20025140 in words is "twenty million, twenty-five thousand, one hundred forty".