21150360323353 has 4 divisors (see below), whose sum is σ = 21241134402228. Its totient is φ = 21059586244480.

The previous prime is 21150360323201. The next prime is 21150360323357. The reversal of 21150360323353 is 35332306305112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8373545989264 + 12776814334089 = 2893708^2 + 3574467^2 .

It is a cyclic number.

It is not a de Polignac number, because 21150360323353 - 2⁹ = 21150360322841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21150360323357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45387039088 + ... + 45387039553.

It is an arithmetic number, because the mean of its divisors is an integer number (5310283600557).

Almost surely, 2^{21150360323353} is an apocalyptic number.

It is an amenable number.

21150360323353 is a deficient number, since it is larger than the sum of its proper divisors (90774078875).

21150360323353 is an equidigital number, since it uses as much as digits as its factorization.

21150360323353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90774078874.

The product of its (nonzero) digits is 145800, while the sum is 37.

Adding to 21150360323353 its reverse (35332306305112), we get a palindrome (56482666628465).

The spelling of 21150360323353 in words is "twenty-one trillion, one hundred fifty billion, three hundred sixty million, three hundred twenty-three thousand, three hundred fifty-three".