21410344431 has 96 divisors (see below), whose sum is σ = 37211166720. Its totient is φ = 11604902400.

The previous prime is 21410344429. The next prime is 21410344469. The reversal of 21410344431 is 13444301412.

21410344431 is a `hidden beast` number, since 214 + 1 + 0 + 3 + 4 + 443 + 1 = 666.

It is not a de Polignac number, because 21410344431 - 2¹ = 21410344429 is a prime.

It is a super-2 number, since 2×21410344431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21410344395 and 21410344404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410344481) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41094451 + ... + 41094971.

It is an arithmetic number, because the mean of its divisors is an integer number (387616320).

Almost surely, 2^21410344431 is an apocalyptic number.

21410344431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21410344431 is a deficient number, since it is larger than the sum of its proper divisors (15800822289).

21410344431 is a wasteful number, since it uses less digits than its factorization.

21410344431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21410344431 its reverse (13444301412), we get a palindrome (34854645843).

The spelling of 21410344431 in words is "twenty-one billion, four hundred ten million, three hundred forty-four thousand, four hundred thirty-one".