20254021 has 8 divisors (see below), whose sum is σ = 21556800. Its totient is φ = 18963648.

The previous prime is 20254009. The next prime is 20254049. The reversal of 20254021 is 12045202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20254021 - 2¹³ = 20245829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20253986 and 20254004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254061) 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 7 ways as a sum of consecutive naturals, for example, 390 + ... + 6376.

It is an arithmetic number, because the mean of its divisors is an integer number (2694600).

Almost surely, 2^20254021 is an apocalyptic number.

It is an amenable number.

20254021 is a deficient number, since it is larger than the sum of its proper divisors (1302779).

20254021 is a wasteful number, since it uses less digits than its factorization.

20254021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6203.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20254021 is about 4500.4467556010. The cubic root of 20254021 is about 272.5861288219.

Adding to 20254021 its reverse (12045202), we get a palindrome (32299223).

The spelling of 20254021 in words is "twenty million, two hundred fifty-four thousand, twenty-one".