23423000520421 has 8 divisors (see below), whose sum is σ = 23549137003160. Its totient is φ = 23296913252352.

The previous prime is 23423000520377. The next prime is 23423000520427. The reversal of 23423000520421 is 12402500032432.

It can be written as a sum of positive squares in 4 ways, for example, as 704526888321 + 22718473632100 = 839361^2 + 4766390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23423000520421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23423000520421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23423000520427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11349036 + ... + 13253173.

It is an arithmetic number, because the mean of its divisors is an integer number (2943642125395).

Almost surely, 2^{23423000520421} is an apocalyptic number.

It is an amenable number.

23423000520421 is a deficient number, since it is larger than the sum of its proper divisors (126136482739).

23423000520421 is a wasteful number, since it uses less digits than its factorization.

23423000520421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24607335.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 23423000520421 its reverse (12402500032432), we get a palindrome (35825500552853).

The spelling of 23423000520421 in words is "twenty-three trillion, four hundred twenty-three billion, five hundred twenty thousand, four hundred twenty-one".