20445356512533 has 64 divisors (see below), whose sum is σ = 29710007712000. Its totient is φ = 12455614218240.

The previous prime is 20445356512523. The next prime is 20445356512541. The reversal of 20445356512533 is 33521565354402.

It is not a de Polignac number, because 20445356512533 - 2¹⁰ = 20445356511509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445356512513) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381637173 + ... + 381690741.

It is an arithmetic number, because the mean of its divisors is an integer number (464218870500).

Almost surely, 2^{20445356512533} is an apocalyptic number.

It is an amenable number.

20445356512533 is a deficient number, since it is larger than the sum of its proper divisors (9264651199467).

20445356512533 is a wasteful number, since it uses less digits than its factorization.

20445356512533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54502.

The product of its (nonzero) digits is 6480000, while the sum is 48.

The spelling of 20445356512533 in words is "twenty trillion, four hundred forty-five billion, three hundred fifty-six million, five hundred twelve thousand, five hundred thirty-three".