21784114188323 has 4 divisors (see below), whose sum is σ = 21917759060808. Its totient is φ = 21650469315840.

The previous prime is 21784114188307. The next prime is 21784114188337. The reversal of 21784114188323 is 32388141148712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21784114188323 - 2⁴ = 21784114188307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21784114188223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66822435998 + ... + 66822436323.

It is an arithmetic number, because the mean of its divisors is an integer number (5479439765202).

Almost surely, 2^{21784114188323} is an apocalyptic number.

21784114188323 is a deficient number, since it is larger than the sum of its proper divisors (133644872485).

21784114188323 is a wasteful number, since it uses less digits than its factorization.

21784114188323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133644872484.

The product of its digits is 2064384, while the sum is 53.

The spelling of 21784114188323 in words is "twenty-one trillion, seven hundred eighty-four billion, one hundred fourteen million, one hundred eighty-eight thousand, three hundred twenty-three".