21246189219 has 16 divisors (see below), whose sum is σ = 31478656000. Its totient is φ = 14162857128.

The previous prime is 21246189121. The next prime is 21246189227. The reversal of 21246189219 is 91298164212.

It is a happy number.

21246189219 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 618 + 9 + 21 + 9 = 666.

It is not a de Polignac number, because 21246189219 - 2⁹ = 21246188707 is a prime.

It is a super-2 number, since 2×21246189219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21246189259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347082 + ... + 403680.

It is an arithmetic number, because the mean of its divisors is an integer number (1967416000).

Almost surely, 2^21246189219 is an apocalyptic number.

21246189219 is a deficient number, since it is larger than the sum of its proper divisors (10232466781).

21246189219 is a wasteful number, since it uses less digits than its factorization.

21246189219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70511 (or 70505 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 21246189219 in words is "twenty-one billion, two hundred forty-six million, one hundred eighty-nine thousand, two hundred nineteen".