21436342323 has 8 divisors (see below), whose sum is σ = 31180134336. Its totient is φ = 12991722600.

The previous prime is 21436342307. The next prime is 21436342337. The reversal of 21436342323 is 32324363412.

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

It is not a de Polignac number, because 21436342323 - 2⁴ = 21436342307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 649586131 = 21436342323 / (2 + 1 + 4 + 3 + 6 + 3 + 4 + 2 + 3 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (21436340323) 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, 324793033 + ... + 324793098.

It is an arithmetic number, because the mean of its divisors is an integer number (3897516792).

Almost surely, 2^21436342323 is an apocalyptic number.

21436342323 is a deficient number, since it is larger than the sum of its proper divisors (9743792013).

21436342323 is a wasteful number, since it uses less digits than its factorization.

21436342323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649586145.

The product of its digits is 62208, while the sum is 33.

It can be divided in two parts, 214363 and 42323, that added together give a triangular number (256686 = T₇₁₆).

The spelling of 21436342323 in words is "twenty-one billion, four hundred thirty-six million, three hundred forty-two thousand, three hundred twenty-three".