20463203047521 has 16 divisors (see below), whose sum is σ = 30660585169536. Its totient is φ = 12045229886976.

The previous prime is 20463203047513. The next prime is 20463203047523. The reversal of 20463203047521 is 12574030236402.

It is not a de Polignac number, because 20463203047521 - 2³ = 20463203047513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20463203047521.

It is not an unprimeable number, because it can be changed into a prime (20463203047523) 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 15 ways as a sum of consecutive naturals, for example, 11406466800 + ... + 11406468593.

It is an arithmetic number, because the mean of its divisors is an integer number (1916286573096).

Almost surely, 2^{20463203047521} is an apocalyptic number.

It is an amenable number.

20463203047521 is a deficient number, since it is larger than the sum of its proper divisors (10197382122015).

20463203047521 is a wasteful number, since it uses less digits than its factorization.

20463203047521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22812935432.

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 20463203047521 in words is "twenty trillion, four hundred sixty-three billion, two hundred three million, forty-seven thousand, five hundred twenty-one".