20031825 has 24 divisors (see below), whose sum is σ = 36131616. Its totient is φ = 9712000.

The previous prime is 20031799. The next prime is 20031829. The reversal of 20031825 is 52813002.

It is not a de Polignac number, because 20031825 - 2⁸ = 20031569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20031829) by changing a digit.

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, 11316 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (1505484).

Almost surely, 2^20031825 is an apocalyptic number.

20031825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20031825 is a deficient number, since it is larger than the sum of its proper divisors (16099791).

20031825 is a wasteful number, since it uses less digits than its factorization.

20031825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24305 (or 24300 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20031825 is about 4475.6926838200. The cubic root of 20031825 is about 271.5856625934.

Adding to 20031825 its reverse (52813002), we get a palindrome (72844827).

It can be divided in two parts, 2003 and 1825, that added together give a triangular number (3828 = T₈₇).

The spelling of 20031825 in words is "twenty million, thirty-one thousand, eight hundred twenty-five".