2544021420 has 24 divisors (see below), whose sum is σ = 7123260144. Its totient is φ = 678405696.

The previous prime is 2544021419. The next prime is 2544021439. The reversal of 2544021420 is 241204452.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21200119 + ... + 21200238.

It is an arithmetic number, because the mean of its divisors is an integer number (296802506).

Almost surely, 2^2544021420 is an apocalyptic number.

2544021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2544021420 is an abundant number, since it is smaller than the sum of its proper divisors (4579238724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2544021420 is a wasteful number, since it uses less digits than its factorization.

2544021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42400369 (or 42400367 counting only the distinct ones).

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

The square root of 2544021420 is about 50438.2931907891. The cubic root of 2544021420 is about 1365.1286706652.

Adding to 2544021420 its reverse (241204452), we get a palindrome (2785225872).

The spelling of 2544021420 in words is "two billion, five hundred forty-four million, twenty-one thousand, four hundred twenty".