21045550515134 has 4 divisors (see below), whose sum is σ = 31568325772704. Its totient is φ = 10522775257566.

The previous prime is 21045550515131. The next prime is 21045550515149. The reversal of 21045550515134 is 43151505554012.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21045550515091 and 21045550515100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045550515131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5261387628782 + ... + 5261387628785.

It is an arithmetic number, because the mean of its divisors is an integer number (7892081443176).

Almost surely, 2^{21045550515134} is an apocalyptic number.

21045550515134 is a deficient number, since it is larger than the sum of its proper divisors (10522775257570).

21045550515134 is a wasteful number, since it uses less digits than its factorization.

21045550515134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10522775257569.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 21045550515134 in words is "twenty-one trillion, forty-five billion, five hundred fifty million, five hundred fifteen thousand, one hundred thirty-four".