20493250 has 16 divisors (see below), whose sum is σ = 38363832. Its totient is φ = 8197200.

The previous prime is 20493197. The next prime is 20493257. The reversal of 20493250 is 5239402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3129361 + 17363889 = 1769^2 + 4167^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20493257) 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, 40737 + ... + 41236.

Almost surely, 2^20493250 is an apocalyptic number.

20493250 is a deficient number, since it is larger than the sum of its proper divisors (17870582).

20493250 is an equidigital number, since it uses as much as digits as its factorization.

20493250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81990 (or 81980 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20493250 is about 4526.9470948974. The cubic root of 20493250 is about 273.6551418247.

The spelling of 20493250 in words is "twenty million, four hundred ninety-three thousand, two hundred fifty".