23353125421 has 4 divisors (see below), whose sum is σ = 23354864092. Its totient is φ = 23351386752.

The previous prime is 23353125407. The next prime is 23353125469. The reversal of 23353125421 is 12452135332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22342775625 + 1010349796 = 149475^2 + 31786^2 .

It is a cyclic number.

It is not a de Polignac number, because 23353125421 - 2¹⁷ = 23352994349 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 (23353125401) 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, 849030 + ... + 876103.

It is an arithmetic number, because the mean of its divisors is an integer number (5838716023).

Almost surely, 2^23353125421 is an apocalyptic number.

It is an amenable number.

23353125421 is a deficient number, since it is larger than the sum of its proper divisors (1738671).

23353125421 is a wasteful number, since it uses less digits than its factorization.

23353125421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738670.

The product of its digits is 21600, while the sum is 31.

The spelling of 23353125421 in words is "twenty-three billion, three hundred fifty-three million, one hundred twenty-five thousand, four hundred twenty-one".