20229825 has 96 divisors (see below), whose sum is σ = 43425792. Its totient is φ = 8064000.

The previous prime is 20229821. The next prime is 20229829. The reversal of 20229825 is 52892202.

It is an interprime number because it is at equal distance from previous prime (20229821) and next prime (20229829).

It is not a de Polignac number, because 20229825 - 2² = 20229821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20229792 and 20229801.

It is not an unprimeable number, because it can be changed into a prime (20229821) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 178969 + ... + 179081.

It is an arithmetic number, because the mean of its divisors is an integer number (452352).

Almost surely, 2^20229825 is an apocalyptic number.

20229825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20229825 is an abundant number, since it is smaller than the sum of its proper divisors (23195967).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20229825 is a wasteful number, since it uses less digits than its factorization.

20229825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20229825 is about 4497.7577747140. The cubic root of 20229825 is about 272.4775393209.

The spelling of 20229825 in words is "twenty million, two hundred twenty-nine thousand, eight hundred twenty-five".