21233161823819 has 16 divisors (see below), whose sum is σ = 23670124418304. Its totient is φ = 18885160912800.

The previous prime is 21233161823777. The next prime is 21233161823821. The reversal of 21233161823819 is 91832816133212.

It is a cyclic number.

It is not a de Polignac number, because 21233161823819 - 2²⁸ = 21232893388363 is a prime.

It is a super-2 number, since 2×21233161823819² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233161823869) 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, 112801472 + ... + 112989549.

It is an arithmetic number, because the mean of its divisors is an integer number (1479382776144).

Almost surely, 2^{21233161823819} is an apocalyptic number.

21233161823819 is a deficient number, since it is larger than the sum of its proper divisors (2436962594485).

21233161823819 is a wasteful number, since it uses less digits than its factorization.

21233161823819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225791218.

The product of its digits is 746496, while the sum is 50.

The spelling of 21233161823819 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred sixty-one million, eight hundred twenty-three thousand, eight hundred nineteen".