20725250 has 64 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 6552000.

The previous prime is 20725249. The next prime is 20725273. The reversal of 20725250 is 5252702.

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 31 ways as a sum of consecutive naturals, for example, 22295 + ... + 23205.

It is an arithmetic number, because the mean of its divisors is an integer number (746928).

Almost surely, 2^20725250 is an apocalyptic number.

20725250 is an abundant number, since it is smaller than the sum of its proper divisors (27078142).

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

20725250 is a wasteful number, since it uses less digits than its factorization.

20725250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20725250 is about 4552.4993135639. The cubic root of 20725250 is about 274.6839343963.

Adding to 20725250 its reverse (5252702), we get a palindrome (25977952).

The spelling of 20725250 in words is "twenty million, seven hundred twenty-five thousand, two hundred fifty".