21599086369 has 12 divisors (see below), whose sum is σ = 25128043248. Its totient is φ = 18511605000.

The previous prime is 21599086283. The next prime is 21599086393. The reversal of 21599086369 is 96368099512.

It is not a de Polignac number, because 21599086369 - 2¹³ = 21599078177 is a prime.

It is a super-2 number, since 2×21599086369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21599080369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682834 + ... + 713764.

It is an arithmetic number, because the mean of its divisors is an integer number (2094003604).

Almost surely, 2^21599086369 is an apocalyptic number.

It is an amenable number.

21599086369 is a deficient number, since it is larger than the sum of its proper divisors (3528956879).

21599086369 is a wasteful number, since it uses less digits than its factorization.

21599086369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45196 (or 45189 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 21599086369 in words is "twenty-one billion, five hundred ninety-nine million, eighty-six thousand, three hundred sixty-nine".