20254321 has 12 divisors (see below), whose sum is σ = 21206772. Its totient is φ = 19336928.

The previous prime is 20254319. The next prime is 20254331. The reversal of 20254321 is 12345202.

It can be written as a sum of positive squares in 2 ways, for example, as 16719921 + 3534400 = 4089^2 + 1880^2 .

It is not a de Polignac number, because 20254321 - 2¹ = 20254319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20254331) 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, 116991 + ... + 117163.

It is an arithmetic number, because the mean of its divisors is an integer number (1767231).

Almost surely, 2^20254321 is an apocalyptic number.

It is an amenable number.

20254321 is a deficient number, since it is larger than the sum of its proper divisors (952451).

20254321 is an equidigital number, since it uses as much as digits as its factorization.

20254321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20254321 is about 4500.4800855020. The cubic root of 20254321 is about 272.5874746524.

Adding to 20254321 its reverse (12345202), we get a palindrome (32599523).

The spelling of 20254321 in words is "twenty million, two hundred fifty-four thousand, three hundred twenty-one".