21142442002 has 16 divisors (see below), whose sum is σ = 34602817824. Its totient is φ = 9608508000.

The previous prime is 21142441937. The next prime is 21142442039. The reversal of 21142442002 is 20024424112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47677 + ... + 211087.

It is an arithmetic number, because the mean of its divisors is an integer number (2162676114).

Almost surely, 2^21142442002 is an apocalyptic number.

21142442002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21142442002 is a deficient number, since it is larger than the sum of its proper divisors (13460375822).

21142442002 is a wasteful number, since it uses less digits than its factorization.

21142442002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169305.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21142442002 its reverse (20024424112), we get a palindrome (41166866114).

The spelling of 21142442002 in words is "twenty-one billion, one hundred forty-two million, four hundred forty-two thousand, two".