21045524030513 has 8 divisors (see below), whose sum is σ = 21189192000480. Its totient is φ = 20902146007680.

The previous prime is 21045524030497. The next prime is 21045524030591. The reversal of 21045524030513 is 31503042554012.

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

It is a cyclic number.

It is not a de Polignac number, because 21045524030513 - 2⁴ = 21045524030497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21045524030813) 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, 72341120 + ... + 72631457.

It is an arithmetic number, because the mean of its divisors is an integer number (2648649000060).

Almost surely, 2^{21045524030513} is an apocalyptic number.

It is an amenable number.

21045524030513 is a deficient number, since it is larger than the sum of its proper divisors (143667969967).

21045524030513 is a wasteful number, since it uses less digits than its factorization.

21045524030513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144973567.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 21045524030513 its reverse (31503042554012), we get a palindrome (52548566584525).

The spelling of 21045524030513 in words is "twenty-one trillion, forty-five billion, five hundred twenty-four million, thirty thousand, five hundred thirteen".