20802225 has 12 divisors (see below), whose sum is σ = 34393136. Its totient is φ = 11094480.

The previous prime is 20802167. The next prime is 20802233. The reversal of 20802225 is 52220802.

It is not a de Polignac number, because 20802225 - 2¹¹ = 20800177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138607 + ... + 138756.

Almost surely, 2^20802225 is an apocalyptic number.

20802225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20802225 is a deficient number, since it is larger than the sum of its proper divisors (13590911).

20802225 is a wasteful number, since it uses less digits than its factorization.

20802225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277376 (or 277371 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20802225 is about 4560.9456256351. The cubic root of 20802225 is about 275.0235792454.

The spelling of 20802225 in words is "twenty million, eight hundred two thousand, two hundred twenty-five".