20933825 has 12 divisors (see below), whose sum is σ = 28318128. Its totient is φ = 15224400.

The previous prime is 20933813. The next prime is 20933827. The reversal of 20933825 is 52833902.

It is not a de Polignac number, because 20933825 - 2⁶ = 20933761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20933791 and 20933800.

It is not an unprimeable number, because it can be changed into a prime (20933827) 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, 37787 + ... + 38336.

It is an arithmetic number, because the mean of its divisors is an integer number (2359844).

Almost surely, 2^20933825 is an apocalyptic number.

20933825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20933825 is a deficient number, since it is larger than the sum of its proper divisors (7384303).

20933825 is a wasteful number, since it uses less digits than its factorization.

20933825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76144 (or 76139 counting only the distinct ones).

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

The square root of 20933825 is about 4575.3497134099. The cubic root of 20933825 is about 275.6023161831.

The spelling of 20933825 in words is "twenty million, nine hundred thirty-three thousand, eight hundred twenty-five".