21144032002 has 32 divisors (see below), whose sum is σ = 32487373440. Its totient is φ = 10318492800.

The previous prime is 21144031973. The next prime is 21144032023. The reversal of 21144032002 is 20023044112.

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 15 ways as a sum of consecutive naturals, for example, 6237324 + ... + 6240712.

It is an arithmetic number, because the mean of its divisors is an integer number (1015230420).

Almost surely, 2^21144032002 is an apocalyptic number.

21144032002 is a deficient number, since it is larger than the sum of its proper divisors (11343341438).

21144032002 is a wasteful number, since it uses less digits than its factorization.

21144032002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21144032002 its reverse (20023044112), we get a palindrome (41167076114).

The spelling of 21144032002 in words is "twenty-one billion, one hundred forty-four million, thirty-two thousand, two".