21445334344242 has 24 divisors (see below), whose sum is σ = 48485103735744. Its totient is φ = 6837642834264.

The previous prime is 21445334344237. The next prime is 21445334344249. The reversal of 21445334344242 is 24244343354412.

21445334344242 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 533 + 4 + 34 + 42 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (21445334344249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25900161838 + ... + 25900162665.

It is an arithmetic number, because the mean of its divisors is an integer number (2020212655656).

Almost surely, 2^{21445334344242} is an apocalyptic number.

21445334344242 is an abundant number, since it is smaller than the sum of its proper divisors (27039769391502).

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

21445334344242 is a wasteful number, since it uses less digits than its factorization.

21445334344242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51800324534 (or 51800324531 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 45.

Adding to 21445334344242 its reverse (24244343354412), we get a palindrome (45689677698654).

The spelling of 21445334344242 in words is "twenty-one trillion, four hundred forty-five billion, three hundred thirty-four million, three hundred forty-four thousand, two hundred forty-two".