20535897288992 has 54 divisors (see below), whose sum is σ = 42949093677273. Its totient is φ = 9663746586112.

The previous prime is 20535897288943. The next prime is 20535897288997. The reversal of 20535897288992 is 29988279853502.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 18794964819856 + 1740932469136 = 4335316^2 + 1319444^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3204364.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535897288997) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 435769943 + ... + 435817065.

Almost surely, 2^{20535897288992} is an apocalyptic number.

It is an amenable number.

20535897288992 is an abundant number, since it is smaller than the sum of its proper divisors (22413196388281).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20535897288992 is an frugal number, since it uses more digits than its factorization.

20535897288992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94290 (or 47142 counting only the distinct ones).

The product of its (nonzero) digits is 1567641600, while the sum is 77.

The spelling of 20535897288992 in words is "twenty trillion, five hundred thirty-five billion, eight hundred ninety-seven million, two hundred eighty-eight thousand, nine hundred ninety-two".