21442023402402 has 16 divisors (see below), whose sum is σ = 42885280975680. Its totient is φ = 7147135438992.

The previous prime is 21442023402389. The next prime is 21442023402451. The reversal of 21442023402402 is 20420432024412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21442023402402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51197853 + ... + 51614960.

It is an arithmetic number, because the mean of its divisors is an integer number (2680330060980).

Almost surely, 2^{21442023402402} is an apocalyptic number.

21442023402402 is an abundant number, since it is smaller than the sum of its proper divisors (21443257573278).

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

21442023402402 is a wasteful number, since it uses less digits than its factorization.

21442023402402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102847577.

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 21442023402402 its reverse (20420432024412), we get a palindrome (41862455426814).

The spelling of 21442023402402 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, four hundred two".