12436263421 has 8 divisors (see below), whose sum is σ = 12577181400. Its totient is φ = 12295694400.

The previous prime is 12436263391. The next prime is 12436263443.

12436263421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 6168374521 + 6267888900 = 78539^2 + 79170^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12436263421 - 2¹³ = 12436255229 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 (12436263451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15226 + ... + 158443.

It is an arithmetic number, because the mean of its divisors is an integer number (1572147675).

Almost surely, 2^12436263421 is an apocalyptic number.

It is an amenable number.

12436263421 is a deficient number, since it is larger than the sum of its proper divisors (140917979).

12436263421 is a wasteful number, since it uses less digits than its factorization.

12436263421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174479.

The product of its digits is 41472, while the sum is 34.

The spelling of 12436263421 in words is "twelve billion, four hundred thirty-six million, two hundred sixty-three thousand, four hundred twenty-one".