21042045002 has 8 divisors (see below), whose sum is σ = 34432437312. Its totient is φ = 9564565900.

The previous prime is 21042044999. The next prime is 21042045049. The reversal of 21042045002 is 20054024012.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478228274 + ... + 478228317.

It is an arithmetic number, because the mean of its divisors is an integer number (4304054664).

Almost surely, 2^21042045002 is an apocalyptic number.

21042045002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21042045002 is a deficient number, since it is larger than the sum of its proper divisors (13390392310).

21042045002 is a wasteful number, since it uses less digits than its factorization.

21042045002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956456604.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 21042045002 its reverse (20054024012), we get a palindrome (41096069014).

The spelling of 21042045002 in words is "twenty-one billion, forty-two million, forty-five thousand, two".