21431411044 has 24 divisors (see below), whose sum is σ = 38384061408. Its totient is φ = 10464625920.

The previous prime is 21431411033. The next prime is 21431411051. The reversal of 21431411044 is 44011413412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828884 + ... + 1840564.

It is an arithmetic number, because the mean of its divisors is an integer number (1599335892).

Almost surely, 2^21431411044 is an apocalyptic number.

It is an amenable number.

21431411044 is a deficient number, since it is larger than the sum of its proper divisors (16952650364).

21431411044 is a wasteful number, since it uses less digits than its factorization.

21431411044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22395 (or 22393 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21431411044 its reverse (44011413412), we get a palindrome (65442824456).

The spelling of 21431411044 in words is "twenty-one billion, four hundred thirty-one million, four hundred eleven thousand, forty-four".