20926625 has 8 divisors (see below), whose sum is σ = 26116584. Its totient is φ = 16741200.

The previous prime is 20926621. The next prime is 20926627. The reversal of 20926625 is 52662902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 123904 + 20802721 = 352^2 + 4561^2 .

It is not a de Polignac number, because 20926625 - 2² = 20926621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20926591 and 20926600.

It is not an unprimeable number, because it can be changed into a prime (20926621) 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, 83582 + ... + 83831.

It is an arithmetic number, because the mean of its divisors is an integer number (3264573).

Almost surely, 2^20926625 is an apocalyptic number.

20926625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20926625 is a deficient number, since it is larger than the sum of its proper divisors (5189959).

20926625 is an equidigital number, since it uses as much as digits as its factorization.

20926625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167428 (or 167418 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20926625 is about 4574.5628206420. The cubic root of 20926625 is about 275.5707155843.

The spelling of 20926625 in words is "twenty million, nine hundred twenty-six thousand, six hundred twenty-five".