23434400421 has 6 divisors (see below), whose sum is σ = 33849689510. Its totient is φ = 15622933608.

The previous prime is 23434400413. The next prime is 23434400489. The reversal of 23434400421 is 12400443432.

It is a happy number.

23434400421 is a `hidden beast` number, since 234 + 3 + 4 + 4 + 0 + 0 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22888664100 + 545736321 = 151290^2 + 23361^2 .

It is not a de Polignac number, because 23434400421 - 2³ = 23434400413 is a prime.

It is a super-2 number, since 2×23434400421² (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 (23434400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1301911126 + ... + 1301911143.

Almost surely, 2^23434400421 is an apocalyptic number.

It is an amenable number.

23434400421 is a deficient number, since it is larger than the sum of its proper divisors (10415289089).

23434400421 is a wasteful number, since it uses less digits than its factorization.

23434400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603822275 (or 2603822272 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 23434400421 its reverse (12400443432), we get a palindrome (35834843853).

The spelling of 23434400421 in words is "twenty-three billion, four hundred thirty-four million, four hundred thousand, four hundred twenty-one".