21598058403 has 12 divisors (see below), whose sum is σ = 31998254920. Its totient is φ = 14398196508.

The previous prime is 21598058401. The next prime is 21598058413. The reversal of 21598058403 is 30485089512.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

21598058403 is a `hidden beast` number, since 2 + 1 + 598 + 0 + 58 + 4 + 0 + 3 = 666.

It is not a de Polignac number, because 21598058403 - 2¹ = 21598058401 is a prime.

It is a super-2 number, since 2×21598058403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21598058401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 749500 + ... + 777782.

Almost surely, 2^21598058403 is an apocalyptic number.

21598058403 is a deficient number, since it is larger than the sum of its proper divisors (10400196517).

21598058403 is an frugal number, since it uses more digits than its factorization.

21598058403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56575 (or 28286 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 21598058403 in words is "twenty-one billion, five hundred ninety-eight million, fifty-eight thousand, four hundred three".