23184640421 has 2 divisors, whose sum is σ = 23184640422. Its totient is φ = 23184640420.

The previous prime is 23184640379. The next prime is 23184640441. The reversal of 23184640421 is 12404648132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23064496900 + 120143521 = 151870^2 + 10961^2 .

It is a cyclic number.

It is not a de Polignac number, because 23184640421 - 2¹⁸ = 23184378277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23184640441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11592320210 + 11592320211.

It is an arithmetic number, because the mean of its divisors is an integer number (11592320211).

Almost surely, 2^23184640421 is an apocalyptic number.

It is an amenable number.

23184640421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23184640421 is an equidigital number, since it uses as much as digits as its factorization.

23184640421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 23184640421 in words is "twenty-three billion, one hundred eighty-four million, six hundred forty thousand, four hundred twenty-one".