21337103471 has 4 divisors (see below), whose sum is σ = 21478408944. Its totient is φ = 21195798000.

The previous prime is 21337103467. The next prime is 21337103507. The reversal of 21337103471 is 17430173312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21337103471 - 2² = 21337103467 is a prime.

It is a super-3 number, since 3×21337103471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337100471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70652510 + ... + 70652811.

It is an arithmetic number, because the mean of its divisors is an integer number (5369602236).

Almost surely, 2^21337103471 is an apocalyptic number.

21337103471 is a deficient number, since it is larger than the sum of its proper divisors (141305473).

21337103471 is a wasteful number, since it uses less digits than its factorization.

21337103471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141305472.

The product of its (nonzero) digits is 10584, while the sum is 32.

Adding to 21337103471 its reverse (17430173312), we get a palindrome (38767276783).

The spelling of 21337103471 in words is "twenty-one billion, three hundred thirty-seven million, one hundred three thousand, four hundred seventy-one".