21535341696 has 160 divisors (see below), whose sum is σ = 69915455280. Its totient is φ = 6525826560.

The previous prime is 21535341689. The next prime is 21535341701. The reversal of 21535341696 is 69614353512.

21535341696 is a `hidden beast` number, since 2 + 1 + 53 + 534 + 1 + 69 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19635 + ... + 208461.

Almost surely, 2^21535341696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21535341696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34957727640).

21535341696 is an abundant number, since it is smaller than the sum of its proper divisors (48380113584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21535341696 is a wasteful number, since it uses less digits than its factorization.

21535341696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188864 (or 188843 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

It can be divided in two parts, 215353416 and 96, that added together give a palindrome (215353512).

The spelling of 21535341696 in words is "twenty-one billion, five hundred thirty-five million, three hundred forty-one thousand, six hundred ninety-six".