20252140 has 24 divisors (see below), whose sum is σ = 43520400. Its totient is φ = 7912128.

The previous prime is 20252137. The next prime is 20252149. The reversal of 20252140 is 4125202.

It is not an unprimeable number, because it can be changed into a prime (20252149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10915 + ... + 12634.

It is an arithmetic number, because the mean of its divisors is an integer number (1813350).

Almost surely, 2^20252140 is an apocalyptic number.

20252140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20252140 is an abundant number, since it is smaller than the sum of its proper divisors (23268260).

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

20252140 is a wasteful number, since it uses less digits than its factorization.

20252140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23601 (or 23599 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20252140 is about 4500.2377714961. The cubic root of 20252140 is about 272.5776901621.

Adding to 20252140 its reverse (4125202), we get a palindrome (24377342).

The spelling of 20252140 in words is "twenty million, two hundred fifty-two thousand, one hundred forty".