21115235455435 has 32 divisors (see below), whose sum is σ = 29120385323520. Its totient is φ = 14536399737600.

The previous prime is 21115235455417. The next prime is 21115235455439. The reversal of 21115235455435 is 53455453251112.

It is not a de Polignac number, because 21115235455435 - 2⁵ = 21115235455403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21115235455439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6982786 + ... + 9538855.

It is an arithmetic number, because the mean of its divisors is an integer number (910012041360).

Almost surely, 2^{21115235455435} is an apocalyptic number.

21115235455435 is a deficient number, since it is larger than the sum of its proper divisors (8005149868085).

21115235455435 is a wasteful number, since it uses less digits than its factorization.

21115235455435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16522899.

The product of its digits is 1800000, while the sum is 46.

The spelling of 21115235455435 in words is "twenty-one trillion, one hundred fifteen billion, two hundred thirty-five million, four hundred fifty-five thousand, four hundred thirty-five".