21453702219 has 12 divisors (see below), whose sum is σ = 30990070176. Its totient is φ = 14301826992.

The previous prime is 21453702191. The next prime is 21453702223. The reversal of 21453702219 is 91220735412.

21453702219 is a `hidden beast` number, since 21 + 45 + 370 + 221 + 9 = 666.

It is not a de Polignac number, because 21453702219 - 2⁸ = 21453701963 is a prime.

It is a super-2 number, since 2×21453702219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21453702269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247977 + ... + 323109.

It is an arithmetic number, because the mean of its divisors is an integer number (2582505848).

Almost surely, 2^21453702219 is an apocalyptic number.

21453702219 is a deficient number, since it is larger than the sum of its proper divisors (9536367957).

21453702219 is a wasteful number, since it uses less digits than its factorization.

21453702219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106866 (or 106863 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21453702219 in words is "twenty-one billion, four hundred fifty-three million, seven hundred two thousand, two hundred nineteen".