21500104433113 has 8 divisors (see below), whose sum is σ = 21516358941000. Its totient is φ = 21483856063488.

The previous prime is 21500104433107. The next prime is 21500104433153. The reversal of 21500104433113 is 31133440100512.

It can be written as a sum of positive squares in 4 ways, for example, as 16225976309904 + 5274128123209 = 4028148^2 + 2296547^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21500104433113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21500104433153) 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, 5485483 + ... + 8549311.

It is an arithmetic number, because the mean of its divisors is an integer number (2689544867625).

Almost surely, 2^{21500104433113} is an apocalyptic number.

It is an amenable number.

21500104433113 is a deficient number, since it is larger than the sum of its proper divisors (16254507887).

21500104433113 is a wasteful number, since it uses less digits than its factorization.

21500104433113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069131.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21500104433113 its reverse (31133440100512), we get a palindrome (52633544533625).

The spelling of 21500104433113 in words is "twenty-one trillion, five hundred billion, one hundred four million, four hundred thirty-three thousand, one hundred thirteen".