23836342421 has 2 divisors, whose sum is σ = 23836342422. Its totient is φ = 23836342420.

The previous prime is 23836342391. The next prime is 23836342429. The reversal of 23836342421 is 12424363832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20761639921 + 3074702500 = 144089^2 + 55450^2 .

It is a cyclic number.

It is not a de Polignac number, because 23836342421 - 2¹⁴ = 23836326037 is a prime.

It is a super-2 number, since 2×23836342421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23836342429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11918171210 + 11918171211.

It is an arithmetic number, because the mean of its divisors is an integer number (11918171211).

Almost surely, 2^23836342421 is an apocalyptic number.

It is an amenable number.

23836342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23836342421 is an equidigital number, since it uses as much as digits as its factorization.

23836342421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 38.

The spelling of 23836342421 in words is "twenty-three billion, eight hundred thirty-six million, three hundred forty-two thousand, four hundred twenty-one".