21695455133 has 16 divisors (see below), whose sum is σ = 23848074432. Its totient is φ = 19573344000.

The previous prime is 21695455109. The next prime is 21695455153. The reversal of 21695455133 is 33155459612.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21695455133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21695455153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966485 + ... + 988677.

It is an arithmetic number, because the mean of its divisors is an integer number (1490504652).

Almost surely, 2^21695455133 is an apocalyptic number.

It is an amenable number.

21695455133 is a deficient number, since it is larger than the sum of its proper divisors (2152619299).

21695455133 is a wasteful number, since it uses less digits than its factorization.

21695455133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22876.

The product of its digits is 486000, while the sum is 44.

The spelling of 21695455133 in words is "twenty-one billion, six hundred ninety-five million, four hundred fifty-five thousand, one hundred thirty-three".