21386633395 has 8 divisors (see below), whose sum is σ = 25665375456. Its totient is φ = 17108363136.

The previous prime is 21386633371. The next prime is 21386633399. The reversal of 21386633395 is 59333668312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21386633395 - 2⁵ = 21386633363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21386633399) 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 7 ways as a sum of consecutive naturals, for example, 9087 + ... + 207016.

It is an arithmetic number, because the mean of its divisors is an integer number (3208171932).

Almost surely, 2^21386633395 is an apocalyptic number.

21386633395 is a deficient number, since it is larger than the sum of its proper divisors (4278742061).

21386633395 is a wasteful number, since it uses less digits than its factorization.

21386633395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235901.

The product of its digits is 2099520, while the sum is 49.

The spelling of 21386633395 in words is "twenty-one billion, three hundred eighty-six million, six hundred thirty-three thousand, three hundred ninety-five".