21160300145 has 16 divisors (see below), whose sum is σ = 25921019520. Its totient is φ = 16577985024.

The previous prime is 21160300141. The next prime is 21160300151. The reversal of 21160300145 is 54100306112.

It is a cyclic number.

It is not a de Polignac number, because 21160300145 - 2² = 21160300141 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21160300145.

It is not an unprimeable number, because it can be changed into a prime (21160300141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58784 + ... + 213953.

It is an arithmetic number, because the mean of its divisors is an integer number (1620063720).

Almost surely, 2^21160300145 is an apocalyptic number.

It is an amenable number.

21160300145 is a deficient number, since it is larger than the sum of its proper divisors (4760719375).

21160300145 is a wasteful number, since it uses less digits than its factorization.

21160300145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273064.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21160300145 its reverse (54100306112), we get a palindrome (75260606257).

The spelling of 21160300145 in words is "twenty-one billion, one hundred sixty million, three hundred thousand, one hundred forty-five".