20493225 has 18 divisors (see below), whose sum is σ = 36706046. Its totient is φ = 10929600.

The previous prime is 20493197. The next prime is 20493257. The reversal of 20493225 is 52239402.

It can be written as a sum of positive squares in 3 ways, for example, as 2752281 + 17740944 = 1659^2 + 4212^2 .

It is not a de Polignac number, because 20493225 - 2¹⁰ = 20492201 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45316 + ... + 45765.

Almost surely, 2^20493225 is an apocalyptic number.

20493225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20493225 is a deficient number, since it is larger than the sum of its proper divisors (16212821).

20493225 is a wasteful number, since it uses less digits than its factorization.

20493225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91097 (or 91089 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20493225 is about 4526.9443336538. The cubic root of 20493225 is about 273.6550305461.

The spelling of 20493225 in words is "twenty million, four hundred ninety-three thousand, two hundred twenty-five".