21423422412402 has 8 divisors (see below), whose sum is σ = 42846844824816. Its totient is φ = 7141140804132.

The previous prime is 21423422412389. The next prime is 21423422412407. The reversal of 21423422412402 is 20421422432412.

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

21423422412402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21423422412407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785285201028 + ... + 1785285201039.

It is an arithmetic number, because the mean of its divisors is an integer number (5355855603102).

Almost surely, 2^{21423422412402} is an apocalyptic number.

21423422412402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423422412402 is a wasteful number, since it uses less digits than its factorization.

21423422412402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570570402072.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 21423422412402 its reverse (20421422432412), we get a palindrome (41844844844814).

The spelling of 21423422412402 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-two million, four hundred twelve thousand, four hundred two".