23253351421 has 4 divisors (see below), whose sum is σ = 23254691644. Its totient is φ = 23252011200.

The previous prime is 23253351413. The next prime is 23253351439. The reversal of 23253351421 is 12415335232.

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 5866028100 + 17387323321 = 76590^2 + 131861^2 .

It is a cyclic number.

It is not a de Polignac number, because 23253351421 - 2³ = 23253351413 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 (23253351461) 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, 643740 + ... + 678901.

It is an arithmetic number, because the mean of its divisors is an integer number (5813672911).

Almost surely, 2^23253351421 is an apocalyptic number.

It is an amenable number.

23253351421 is a deficient number, since it is larger than the sum of its proper divisors (1340223).

23253351421 is a wasteful number, since it uses less digits than its factorization.

23253351421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340222.

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

Adding to 23253351421 its reverse (12415335232), we get a palindrome (35668686653).

The spelling of 23253351421 in words is "twenty-three billion, two hundred fifty-three million, three hundred fifty-one thousand, four hundred twenty-one".