21034153435 has 16 divisors (see below), whose sum is σ = 25509492000. Its totient is φ = 16649199616.

The previous prime is 21034153429. The next prime is 21034153447. The reversal of 21034153435 is 53435143012.

It is a cyclic number.

It is not a de Polignac number, because 21034153435 - 2⁵ = 21034153403 is a prime.

It is a super-2 number, since 2×21034153435² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21034153397 and 21034153406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136536 + ... + 246394.

It is an arithmetic number, because the mean of its divisors is an integer number (1594343250).

Almost surely, 2^21034153435 is an apocalyptic number.

21034153435 is a deficient number, since it is larger than the sum of its proper divisors (4475338565).

21034153435 is a wasteful number, since it uses less digits than its factorization.

21034153435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110270.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 21034153435 its reverse (53435143012), we get a palindrome (74469296447).

The spelling of 21034153435 in words is "twenty-one billion, thirty-four million, one hundred fifty-three thousand, four hundred thirty-five".