20125216 has 12 divisors (see below), whose sum is σ = 39621582. Its totient is φ = 10062592.

The previous prime is 20125177. The next prime is 20125241. The reversal of 20125216 is 61252102.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 9859600 = 3204^2 + 3140^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20125193 and 20125202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314425 + ... + 314488.

Almost surely, 2^20125216 is an apocalyptic number.

It is an amenable number.

20125216 is a deficient number, since it is larger than the sum of its proper divisors (19496366).

20125216 is an equidigital number, since it uses as much as digits as its factorization.

20125216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628923 (or 628915 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20125216 is about 4486.1136855858. The cubic root of 20125216 is about 272.0070644071.

Adding to 20125216 its reverse (61252102), we get a palindrome (81377318).

The spelling of 20125216 in words is "twenty million, one hundred twenty-five thousand, two hundred sixteen".