21401033144 has 16 divisors (see below), whose sum is σ = 40442899200. Its totient is φ = 10616260032.

The previous prime is 21401033057. The next prime is 21401033153. The reversal of 21401033144 is 44133010412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10530989 + ... + 10533020.

It is an arithmetic number, because the mean of its divisors is an integer number (2527681200).

Almost surely, 2^21401033144 is an apocalyptic number.

It is an amenable number.

21401033144 is a deficient number, since it is larger than the sum of its proper divisors (19041866056).

21401033144 is a wasteful number, since it uses less digits than its factorization.

21401033144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21064142 (or 21064138 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21401033144 its reverse (44133010412), we get a palindrome (65534043556).

The spelling of 21401033144 in words is "twenty-one billion, four hundred one million, thirty-three thousand, one hundred forty-four".