20877225 has 12 divisors (see below), whose sum is σ = 34517136. Its totient is φ = 11134480.

The previous prime is 20877223. The next prime is 20877247. The reversal of 20877225 is 52277802.

It is not a de Polignac number, because 20877225 - 2¹ = 20877223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20877221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139107 + ... + 139256.

It is an arithmetic number, because the mean of its divisors is an integer number (2876428).

Almost surely, 2^20877225 is an apocalyptic number.

20877225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20877225 is a deficient number, since it is larger than the sum of its proper divisors (13639911).

20877225 is a wasteful number, since it uses less digits than its factorization.

20877225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278376 (or 278371 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 20877225 is about 4569.1602073029. The cubic root of 20877225 is about 275.3537046501.

The spelling of 20877225 in words is "twenty million, eight hundred seventy-seven thousand, two hundred twenty-five".