2544020421 has 8 divisors (see below), whose sum is σ = 3425612064. Its totient is φ = 1679221200.

The previous prime is 2544020407. The next prime is 2544020431. The reversal of 2544020421 is 1240204452.

It is a happy number.

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

It is not a de Polignac number, because 2544020421 - 2¹⁴ = 2544004037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2544020391 and 2544020400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544020431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4197751 + ... + 4198356.

It is an arithmetic number, because the mean of its divisors is an integer number (428201508).

Almost surely, 2^2544020421 is an apocalyptic number.

It is an amenable number.

2544020421 is a deficient number, since it is larger than the sum of its proper divisors (881591643).

2544020421 is a wasteful number, since it uses less digits than its factorization.

2544020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8396211.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 2544020421 is about 50438.2832875981. The cubic root of 2544020421 is about 1365.1284919765.

Adding to 2544020421 its reverse (1240204452), we get a palindrome (3784224873).

The spelling of 2544020421 in words is "two billion, five hundred forty-four million, twenty thousand, four hundred twenty-one".