184243420021 has 4 divisors (see below), whose sum is σ = 184258530432. Its totient is φ = 184228309612.

The previous prime is 184243420007. The next prime is 184243420087. The reversal of 184243420021 is 120024342481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 184243420021 - 2¹¹ = 184243417973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (184243120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7536901 + ... + 7561306.

It is an arithmetic number, because the mean of its divisors is an integer number (46064632608).

Almost surely, 2^184243420021 is an apocalyptic number.

It is an amenable number.

184243420021 is a deficient number, since it is larger than the sum of its proper divisors (15110411).

184243420021 is a wasteful number, since it uses less digits than its factorization.

184243420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15110410.

The product of its (nonzero) digits is 12288, while the sum is 31.

The spelling of 184243420021 in words is "one hundred eighty-four billion, two hundred forty-three million, four hundred twenty thousand, twenty-one".