21024260535242 has 8 divisors (see below), whose sum is σ = 31577400416100. Its totient is φ = 10498460396544.

The previous prime is 21024260535227. The next prime is 21024260535251. The reversal of 21024260535242 is 24253506242012.

It can be written as a sum of positive squares in 2 ways, for example, as 20935300911121 + 88959624121 = 4575511^2 + 298261^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21024260535196 and 21024260535205.

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, 6834933617 + ... + 6834936692.

Almost surely, 2^{21024260535242} is an apocalyptic number.

21024260535242 is a deficient number, since it is larger than the sum of its proper divisors (10553139880858).

21024260535242 is a wasteful number, since it uses less digits than its factorization.

21024260535242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13669871080.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 21024260535242 its reverse (24253506242012), we get a palindrome (45277766777254).

The spelling of 21024260535242 in words is "twenty-one trillion, twenty-four billion, two hundred sixty million, five hundred thirty-five thousand, two hundred forty-two".