21400220195 has 8 divisors (see below), whose sum is σ = 25843833744. Its totient is φ = 17011129824.

The previous prime is 21400220189. The next prime is 21400220207. The reversal of 21400220195 is 59102200412.

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 21400220195 - 2⁶ = 21400220131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 13629929 + ... + 13631498.

It is an arithmetic number, because the mean of its divisors is an integer number (3230479218).

Almost surely, 2^21400220195 is an apocalyptic number.

21400220195 is a deficient number, since it is larger than the sum of its proper divisors (4443613549).

21400220195 is a wasteful number, since it uses less digits than its factorization.

21400220195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27261589.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 21400220195 in words is "twenty-one billion, four hundred million, two hundred twenty thousand, one hundred ninety-five".