21456175103 has 16 divisors (see below), whose sum is σ = 24243442560. Its totient is φ = 18810002400.

The previous prime is 21456175093. The next prime is 21456175109. The reversal of 21456175103 is 30157165412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21456175103 - 2¹⁴ = 21456158719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21456175109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223148 + ... + 304478.

It is an arithmetic number, because the mean of its divisors is an integer number (1515215160).

Almost surely, 2^21456175103 is an apocalyptic number.

21456175103 is a deficient number, since it is larger than the sum of its proper divisors (2787267457).

21456175103 is a wasteful number, since it uses less digits than its factorization.

21456175103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82198.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 21456175103 in words is "twenty-one billion, four hundred fifty-six million, one hundred seventy-five thousand, one hundred three".