21598428107 has 16 divisors (see below), whose sum is σ = 23838170400. Its totient is φ = 19477086720.

The previous prime is 21598428043. The next prime is 21598428143. The reversal of 21598428107 is 70182489512.

It is not a de Polignac number, because 21598428107 - 2⁶ = 21598428043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21598428157) 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, 102632 + ... + 231797.

It is an arithmetic number, because the mean of its divisors is an integer number (1489885650).

Almost surely, 2^21598428107 is an apocalyptic number.

21598428107 is a deficient number, since it is larger than the sum of its proper divisors (2239742293).

21598428107 is a wasteful number, since it uses less digits than its factorization.

21598428107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334606.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 21598428107 in words is "twenty-one billion, five hundred ninety-eight million, four hundred twenty-eight thousand, one hundred seven".