21214145196 has 18 divisors (see below), whose sum is σ = 53624644892. Its totient is φ = 7071381720.

The previous prime is 21214145191. The next prime is 21214145201. The reversal of 21214145196 is 69154141212.

21214145196 is a `hidden beast` number, since 2 + 121 + 4 + 14 + 519 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (21214145191) and next prime (21214145201).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 589281811 = 21214145196 / (2 + 1 + 2 + 1 + 4 + 1 + 4 + 5 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 21214145196.

It is not an unprimeable number, because it can be changed into a prime (21214145191) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 294640870 + ... + 294640941.

Almost surely, 2^21214145196 is an apocalyptic number.

It is an amenable number.

21214145196 is an abundant number, since it is smaller than the sum of its proper divisors (32410499696).

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

21214145196 is a wasteful number, since it uses less digits than its factorization.

21214145196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589281821 (or 589281816 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The spelling of 21214145196 in words is "twenty-one billion, two hundred fourteen million, one hundred forty-five thousand, one hundred ninety-six".