21143100195 has 64 divisors (see below), whose sum is σ = 43096135680. Its totient is φ = 9634204800.

The previous prime is 21143100163. The next prime is 21143100203. The reversal of 21143100195 is 59100134112.

It is a happy number.

21143100195 is a `hidden beast` number, since 211 + 431 + 0 + 0 + 19 + 5 = 666.

It is not a de Polignac number, because 21143100195 - 2⁵ = 21143100163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 257925 + ... + 329865.

It is an arithmetic number, because the mean of its divisors is an integer number (673377120).

Almost surely, 2^21143100195 is an apocalyptic number.

21143100195 is an abundant number, since it is smaller than the sum of its proper divisors (21953035485).

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

21143100195 is a wasteful number, since it uses less digits than its factorization.

21143100195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72273 (or 72267 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 21143100195 in words is "twenty-one billion, one hundred forty-three million, one hundred thousand, one hundred ninety-five".