24240040020421 has 16 divisors (see below), whose sum is σ = 24421606962480. Its totient is φ = 24059015331840.

The previous prime is 24240040020353. The next prime is 24240040020541. The reversal of 24240040020421 is 12402004004242.

It can be written as a sum of positive squares in 8 ways, for example, as 32547768100 + 24207492252321 = 180410^2 + 4920111^2 .

It is not a de Polignac number, because 24240040020421 - 2¹⁹ = 24240039496133 is a prime.

It is a super-2 number, since 2×24240040020421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24240040120421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523101765 + ... + 523148101.

It is an arithmetic number, because the mean of its divisors is an integer number (1526350435155).

Almost surely, 2^{24240040020421} is an apocalyptic number.

It is an amenable number.

24240040020421 is a deficient number, since it is larger than the sum of its proper divisors (181566942059).

24240040020421 is a wasteful number, since it uses less digits than its factorization.

24240040020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52104.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 24240040020421 its reverse (12402004004242), we get a palindrome (36642044024663).

The spelling of 24240040020421 in words is "twenty-four trillion, two hundred forty billion, forty million, twenty thousand, four hundred twenty-one".