20381925 has 24 divisors (see below), whose sum is σ = 34863840. Its totient is φ = 10494400.

The previous prime is 20381909. The next prime is 20381939. The reversal of 20381925 is 52918302.

It is a happy number.

It is not a de Polignac number, because 20381925 - 2⁴ = 20381909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20381892 and 20381901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2511 + ... + 6860.

It is an arithmetic number, because the mean of its divisors is an integer number (1452660).

Almost surely, 2^20381925 is an apocalyptic number.

20381925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20381925 is a deficient number, since it is larger than the sum of its proper divisors (14481915).

20381925 is a wasteful number, since it uses less digits than its factorization.

20381925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413 (or 9408 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20381925 is about 4514.6345367039. The cubic root of 20381925 is about 273.1587183698.

It can be divided in two parts, 203 and 81925, that added together give a palindrome (82128).

The spelling of 20381925 in words is "twenty million, three hundred eighty-one thousand, nine hundred twenty-five".