21819055095 has 12 divisors (see below), whose sum is σ = 37819695576. Its totient is φ = 11636829360.

The previous prime is 21819055057. The next prime is 21819055151. The reversal of 21819055095 is 59055091812.

21819055095 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 9 + 0 + 550 + 95 = 666.

It is not a de Polignac number, because 21819055095 - 2⁶ = 21819055031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 484867891 = 21819055095 / (2 + 1 + 8 + 1 + 9 + 0 + 5 + 5 + 0 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 21819055095.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242433901 + ... + 242433990.

It is an arithmetic number, because the mean of its divisors is an integer number (3151641298).

Almost surely, 2^21819055095 is an apocalyptic number.

21819055095 is a deficient number, since it is larger than the sum of its proper divisors (16000640481).

21819055095 is a wasteful number, since it uses less digits than its factorization.

21819055095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484867902 (or 484867899 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 21819055095 in words is "twenty-one billion, eight hundred nineteen million, fifty-five thousand, ninety-five".