21364757072145 has 24 divisors (see below), whose sum is σ = 37046027805696. Its totient is φ = 11390296423968.

The previous prime is 21364757072143. The next prime is 21364757072149. The reversal of 21364757072145 is 54127075746312.

21364757072145 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 4 + 7 + 570 + 7 + 21 + 45 = 666.

It is not a de Polignac number, because 21364757072145 - 2¹ = 21364757072143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21364757072091 and 21364757072100.

It is not an unprimeable number, because it can be changed into a prime (21364757072143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88225267 + ... + 88467096.

It is an arithmetic number, because the mean of its divisors is an integer number (1543584491904).

Almost surely, 2^{21364757072145} is an apocalyptic number.

It is an amenable number.

21364757072145 is a deficient number, since it is larger than the sum of its proper divisors (15681270733551).

21364757072145 is a wasteful number, since it uses less digits than its factorization.

21364757072145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176695061 (or 176695058 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 54.

The spelling of 21364757072145 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred fifty-seven million, seventy-two thousand, one hundred forty-five".