21024341442 has 24 divisors (see below), whose sum is σ = 49056797244. Its totient is φ = 6469028064.

The previous prime is 21024341417. The next prime is 21024341449. The reversal of 21024341442 is 24414342012.

21024341442 is a `hidden beast` number, since 2 + 1 + 0 + 243 + 414 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20317366521 + 706974921 = 142539^2 + 26589^2 .

It is not an unprimeable number, because it can be changed into a prime (21024341449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44923573 + ... + 44924040.

Almost surely, 2^21024341442 is an apocalyptic number.

21024341442 is an abundant number, since it is smaller than the sum of its proper divisors (28032455802).

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

21024341442 is a wasteful number, since it uses less digits than its factorization.

21024341442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89847634 (or 89847631 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21024341442 its reverse (24414342012), we get a palindrome (45438683454).

The spelling of 21024341442 in words is "twenty-one billion, twenty-four million, three hundred forty-one thousand, four hundred forty-two".