23402453421 has 4 divisors (see below), whose sum is σ = 31203271232. Its totient is φ = 15601635612.

The previous prime is 23402453411. The next prime is 23402453497. The reversal of 23402453421 is 12435420432.

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 not a de Polignac number, because 23402453421 - 2⁷ = 23402453293 is a prime.

It is a super-2 number, since 2×23402453421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402453411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900408901 + ... + 3900408906.

It is an arithmetic number, because the mean of its divisors is an integer number (7800817808).

Almost surely, 2^23402453421 is an apocalyptic number.

It is an amenable number.

23402453421 is a deficient number, since it is larger than the sum of its proper divisors (7800817811).

23402453421 is an equidigital number, since it uses as much as digits as its factorization.

23402453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800817810.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 23402453421 its reverse (12435420432), we get a palindrome (35837873853).

The spelling of 23402453421 in words is "twenty-three billion, four hundred two million, four hundred fifty-three thousand, four hundred twenty-one".