20254421 has 16 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 17484720.

The previous prime is 20254411. The next prime is 20254433. The reversal of 20254421 is 12445202.

It is a happy number.

It is not a de Polignac number, because 20254421 - 2⁶ = 20254357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20254393 and 20254402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56240 + ... + 56598.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^20254421 is an apocalyptic number.

It is an amenable number.

20254421 is a deficient number, since it is larger than the sum of its proper divisors (2969899).

20254421 is a wasteful number, since it uses less digits than its factorization.

20254421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 20254421 is about 4500.4911954141. The cubic root of 20254421 is about 272.5879232596.

Adding to 20254421 its reverse (12445202), we get a palindrome (32699623).

It can be divided in two parts, 2025 and 4421, that added together give a palindrome (6446).

The spelling of 20254421 in words is "twenty million, two hundred fifty-four thousand, four hundred twenty-one".