20941925 has 6 divisors (see below), whose sum is σ = 25968018. Its totient is φ = 16753520.

The previous prime is 20941913. The next prime is 20941927. The reversal of 20941925 is 52914902.

It can be written as a sum of positive squares in 3 ways, for example, as 20449 + 20921476 = 143^2 + 4574^2 .

It is not a de Polignac number, because 20941925 - 2¹⁰ = 20940901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20941891 and 20941900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20941927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 418814 + ... + 418863.

It is an arithmetic number, because the mean of its divisors is an integer number (4328003).

Almost surely, 2^20941925 is an apocalyptic number.

20941925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20941925 is a deficient number, since it is larger than the sum of its proper divisors (5026093).

20941925 is an equidigital number, since it uses as much as digits as its factorization.

20941925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837687 (or 837682 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 20941925 is about 4576.2348060387. The cubic root of 20941925 is about 275.6378581970.

The spelling of 20941925 in words is "twenty million, nine hundred forty-one thousand, nine hundred twenty-five".