20031625 has 8 divisors (see below), whose sum is σ = 24999624. Its totient is φ = 16025200.

The previous prime is 20031619. The next prime is 20031629. The reversal of 20031625 is 52613002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 19927296 = 323^2 + 4464^2 .

It is not a de Polignac number, because 20031625 - 2¹⁷ = 19900553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80002 + ... + 80251.

It is an arithmetic number, because the mean of its divisors is an integer number (3124953).

Almost surely, 2^20031625 is an apocalyptic number.

20031625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20031625 is a deficient number, since it is larger than the sum of its proper divisors (4967999).

20031625 is an equidigital number, since it uses as much as digits as its factorization.

20031625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160268 (or 160258 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20031625 is about 4475.6703408540. The cubic root of 20031625 is about 271.5847587431.

Adding to 20031625 its reverse (52613002), we get a palindrome (72644627).

The spelling of 20031625 in words is "twenty million, thirty-one thousand, six hundred twenty-five".