21010425435 has 128 divisors (see below), whose sum is σ = 40813977600. Its totient is φ = 10219063680.

The previous prime is 21010425419. The next prime is 21010425479. The reversal of 21010425435 is 53452401012.

21010425435 is a `hidden beast` number, since 2 + 10 + 104 + 2 + 543 + 5 = 666.

It is not a de Polignac number, because 21010425435 - 2⁴ = 21010425419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21010425399 and 21010425408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7829604 + ... + 7832286.

It is an arithmetic number, because the mean of its divisors is an integer number (318859200).

Almost surely, 2^21010425435 is an apocalyptic number.

21010425435 is a deficient number, since it is larger than the sum of its proper divisors (19803552165).

21010425435 is a wasteful number, since it uses less digits than its factorization.

21010425435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21010425435 its reverse (53452401012), we get a palindrome (74462826447).

The spelling of 21010425435 in words is "twenty-one billion, ten million, four hundred twenty-five thousand, four hundred thirty-five".