20031025 has 24 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 13258560.

The previous prime is 20030987. The next prime is 20031029. The reversal of 20031025 is 52013002.

It is not a de Polignac number, because 20031025 - 2¹¹ = 20028977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20030996 and 20031014.

It is not an unprimeable number, because it can be changed into a prime (20031029) 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, 3102 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (1223880).

Almost surely, 2^20031025 is an apocalyptic number.

20031025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20031025 is a deficient number, since it is larger than the sum of its proper divisors (9342095).

20031025 is a wasteful number, since it uses less digits than its factorization.

20031025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3988 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20031025 is about 4475.6033112866. The cubic root of 20031025 is about 271.5820471561.

Adding to 20031025 its reverse (52013002), we get a palindrome (72044027).

The spelling of 20031025 in words is "twenty million, thirty-one thousand, twenty-five".