20145250 has 32 divisors (see below), whose sum is σ = 38359152. Its totient is φ = 7920000.

The previous prime is 20145241. The next prime is 20145269. The reversal of 20145250 is 5254102.

It can be written as a sum of positive squares in 8 ways, for example, as 351649 + 19793601 = 593^2 + 4449^2 .

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 15 ways as a sum of consecutive naturals, for example, 14590 + ... + 15910.

Almost surely, 2^20145250 is an apocalyptic number.

20145250 is a deficient number, since it is larger than the sum of its proper divisors (18213902).

20145250 is a wasteful number, since it uses less digits than its factorization.

20145250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20145250 is about 4488.3460205292. The cubic root of 20145250 is about 272.0972925450.

Adding to 20145250 its reverse (5254102), we get a palindrome (25399352).

It can be divided in two parts, 201 and 45250, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 20145250 in words is "twenty million, one hundred forty-five thousand, two hundred fifty".