2021042544 has 20 divisors (see below), whose sum is σ = 5221026696. Its totient is φ = 673680832.

The previous prime is 2021042411. The next prime is 2021042557. The reversal of 2021042544 is 4452401202.

It is a happy number.

It is a super-2 number, since 2×2021042544² = 8169225929315983872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21052479 + ... + 21052574.

Almost surely, 2^2021042544 is an apocalyptic number.

2021042544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021042544 is an abundant number, since it is smaller than the sum of its proper divisors (3199984152).

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

2021042544 is a wasteful number, since it uses less digits than its factorization.

2021042544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42105064 (or 42105058 counting only the distinct ones).

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

The square root of 2021042544 is about 44956.0067621669. The cubic root of 2021042544 is about 1264.3243005674.

Adding to 2021042544 its reverse (4452401202), we get a palindrome (6473443746).

The spelling of 2021042544 in words is "two billion, twenty-one million, forty-two thousand, five hundred forty-four".