21403244002 has 24 divisors (see below), whose sum is σ = 37631586960. Its totient is φ = 9102791880.

The previous prime is 21403243999. The next prime is 21403244039. The reversal of 21403244002 is 20044230412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820752 + ... + 846427.

It is an arithmetic number, because the mean of its divisors is an integer number (1567982790).

Almost surely, 2^21403244002 is an apocalyptic number.

21403244002 is a deficient number, since it is larger than the sum of its proper divisors (16228342958).

21403244002 is a wasteful number, since it uses less digits than its factorization.

21403244002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667326 (or 1667319 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21403244002 its reverse (20044230412), we get a palindrome (41447474414).

The spelling of 21403244002 in words is "twenty-one billion, four hundred three million, two hundred forty-four thousand, two".