21435122885 has 16 divisors (see below), whose sum is σ = 28079352000. Its totient is φ = 15578720640.

The previous prime is 21435122789. The next prime is 21435122899. The reversal of 21435122885 is 58822153412.

It is not a de Polignac number, because 21435122885 - 2¹⁰ = 21435121861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47552 + ... + 212441.

It is an arithmetic number, because the mean of its divisors is an integer number (1754959500).

Almost surely, 2^21435122885 is an apocalyptic number.

It is an amenable number.

21435122885 is a deficient number, since it is larger than the sum of its proper divisors (6644229115).

21435122885 is a wasteful number, since it uses less digits than its factorization.

21435122885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261508.

The product of its digits is 153600, while the sum is 41.

The spelling of 21435122885 in words is "twenty-one billion, four hundred thirty-five million, one hundred twenty-two thousand, eight hundred eighty-five".