20535897288993 has 8 divisors (see below), whose sum is σ = 27381388291488. Its totient is φ = 13690502239584.

The previous prime is 20535897288943. The next prime is 20535897288997. The reversal of 20535897288993 is 39988279853502.

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

It is not a de Polignac number, because 20535897288993 - 2¹² = 20535897284897 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 23487396 + ... + 24346037.

It is an arithmetic number, because the mean of its divisors is an integer number (3422673536436).

Almost surely, 2^{20535897288993} is an apocalyptic number.

It is an amenable number.

20535897288993 is a deficient number, since it is larger than the sum of its proper divisors (6845491002495).

20535897288993 is a wasteful number, since it uses less digits than its factorization.

20535897288993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47976543.

The product of its (nonzero) digits is 2351462400, while the sum is 78.

The spelling of 20535897288993 in words is "twenty trillion, five hundred thirty-five billion, eight hundred ninety-seven million, two hundred eighty-eight thousand, nine hundred ninety-three".