21436064113242 has 8 divisors (see below), whose sum is σ = 42872128226496. Its totient is φ = 7145354704412.

The previous prime is 21436064113241. The next prime is 21436064113279. The reversal of 21436064113242 is 24231146063412.

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

21436064113242 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21436064113242.

It is not an unprimeable number, because it can be changed into a prime (21436064113241) 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, 1786338676098 + ... + 1786338676109.

It is an arithmetic number, because the mean of its divisors is an integer number (5359016028312).

Almost surely, 2^{21436064113242} is an apocalyptic number.

21436064113242 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.

21436064113242 is a wasteful number, since it uses less digits than its factorization.

21436064113242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572677352212.

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 21436064113242 in words is "twenty-one trillion, four hundred thirty-six billion, sixty-four million, one hundred thirteen thousand, two hundred forty-two".