21431414044 has 6 divisors (see below), whose sum is σ = 37504974584. Its totient is φ = 10715707020.

The previous prime is 21431414041. The next prime is 21431414057. The reversal of 21431414044 is 44041413412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431414041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678926752 + ... + 2678926759.

Almost surely, 2^21431414044 is an apocalyptic number.

It is an amenable number.

21431414044 is a deficient number, since it is larger than the sum of its proper divisors (16073560540).

21431414044 is a wasteful number, since it uses less digits than its factorization.

21431414044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357853515 (or 5357853513 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21431414044 its reverse (44041413412), we get a palindrome (65472827456).

The spelling of 21431414044 in words is "twenty-one billion, four hundred thirty-one million, four hundred fourteen thousand, forty-four".