21435253435 has 8 divisors (see below), whose sum is σ = 25813197360. Its totient is φ = 17087607264.

The previous prime is 21435253429. The next prime is 21435253451. The reversal of 21435253435 is 53435253412.

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

It is a cyclic number.

It is not a de Polignac number, because 21435253435 - 2²⁵ = 21401699003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21435253394 and 21435253403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7572880 + ... + 7575709.

It is an arithmetic number, because the mean of its divisors is an integer number (3226649670).

Almost surely, 2^21435253435 is an apocalyptic number.

21435253435 is a deficient number, since it is larger than the sum of its proper divisors (4377943925).

21435253435 is a wasteful number, since it uses less digits than its factorization.

21435253435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15148877.

The product of its digits is 216000, while the sum is 37.

The spelling of 21435253435 in words is "twenty-one billion, four hundred thirty-five million, two hundred fifty-three thousand, four hundred thirty-five".