21265652435 has 32 divisors (see below), whose sum is σ = 27428544000. Its totient is φ = 15780669696.

The previous prime is 21265652423. The next prime is 21265652437. The reversal of 21265652435 is 53425656212.

It is a cyclic number.

It is not a de Polignac number, because 21265652435 - 2¹⁸ = 21265390291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21265652392 and 21265652401.

It is not an unprimeable number, because it can be changed into a prime (21265652437) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 858656 + ... + 883074.

It is an arithmetic number, because the mean of its divisors is an integer number (857142000).

Almost surely, 2^21265652435 is an apocalyptic number.

21265652435 is a deficient number, since it is larger than the sum of its proper divisors (6162891565).

21265652435 is a wasteful number, since it uses less digits than its factorization.

21265652435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24635.

The product of its digits is 432000, while the sum is 41.

The spelling of 21265652435 in words is "twenty-one billion, two hundred sixty-five million, six hundred fifty-two thousand, four hundred thirty-five".