21431104413 has 8 divisors (see below), whose sum is σ = 28575506688. Its totient is φ = 14287052544.

The previous prime is 21431104399. The next prime is 21431104421. The reversal of 21431104413 is 31440113412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21431104413 - 2⁹ = 21431103901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431104913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138420 + ... + 249042.

It is an arithmetic number, because the mean of its divisors is an integer number (3571938336).

Almost surely, 2^21431104413 is an apocalyptic number.

It is an amenable number.

21431104413 is a deficient number, since it is larger than the sum of its proper divisors (7144402275).

21431104413 is a wasteful number, since it uses less digits than its factorization.

21431104413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175203.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21431104413 its reverse (31440113412), we get a palindrome (52871217825).

The spelling of 21431104413 in words is "twenty-one billion, four hundred thirty-one million, one hundred four thousand, four hundred thirteen".