20245532544721 has 32 divisors (see below), whose sum is σ = 24006998016000. Its totient is φ = 16867841760000.

The previous prime is 20245532544697. The next prime is 20245532544749. The reversal of 20245532544721 is 12744523554202.

It is not a de Polignac number, because 20245532544721 - 2¹¹ = 20245532542673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245532544521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17589880 + ... + 18705478.

It is an arithmetic number, because the mean of its divisors is an integer number (750218688000).

Almost surely, 2^{20245532544721} is an apocalyptic number.

It is an amenable number.

20245532544721 is a deficient number, since it is larger than the sum of its proper divisors (3761465471279).

20245532544721 is a wasteful number, since it uses less digits than its factorization.

20245532544721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118461.

The product of its (nonzero) digits is 2688000, while the sum is 46.

The spelling of 20245532544721 in words is "twenty trillion, two hundred forty-five billion, five hundred thirty-two million, five hundred forty-four thousand, seven hundred twenty-one".