21599810013 has 8 divisors (see below), whose sum is σ = 29578118368. Its totient is φ = 14010687504.

The previous prime is 21599809967. The next prime is 21599810047. The reversal of 21599810013 is 31001899512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21599810013 - 2⁸ = 21599809757 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 (21599814013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97296331 + ... + 97296552.

It is an arithmetic number, because the mean of its divisors is an integer number (3697264796).

Almost surely, 2^21599810013 is an apocalyptic number.

It is an amenable number.

21599810013 is a deficient number, since it is larger than the sum of its proper divisors (7978308355).

21599810013 is a wasteful number, since it uses less digits than its factorization.

21599810013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194592923.

The product of its (nonzero) digits is 19440, while the sum is 39.

The spelling of 21599810013 in words is "twenty-one billion, five hundred ninety-nine million, eight hundred ten thousand, thirteen".