20885888499 has 8 divisors (see below), whose sum is σ = 31826115840. Its totient is φ = 11934793416.

The previous prime is 20885888497. The next prime is 20885888503. The reversal of 20885888499 is 99488858802.

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

It is not a de Polignac number, because 20885888499 - 2¹ = 20885888497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20885888497) 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, 497283039 + ... + 497283080.

It is an arithmetic number, because the mean of its divisors is an integer number (3978264480).

Almost surely, 2^20885888499 is an apocalyptic number.

20885888499 is a deficient number, since it is larger than the sum of its proper divisors (10940227341).

20885888499 is an equidigital number, since it uses as much as digits as its factorization.

20885888499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994566129.

The product of its (nonzero) digits is 106168320, while the sum is 69.

The spelling of 20885888499 in words is "twenty billion, eight hundred eighty-five million, eight hundred eighty-eight thousand, four hundred ninety-nine".