20858240288 has 48 divisors (see below), whose sum is σ = 43203263544. Its totient is φ = 9899735040.

The previous prime is 20858240281. The next prime is 20858240303. The reversal of 20858240288 is 88204285802.

It can be written as a sum of positive squares in 4 ways, for example, as 9406672144 + 11451568144 = 96988^2 + 107012^2 .

It is not an unprimeable number, because it can be changed into a prime (20858240281) 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, 166295 + ... + 263382.

Almost surely, 2^20858240288 is an apocalyptic number.

It is an amenable number.

20858240288 is an abundant number, since it is smaller than the sum of its proper divisors (22345023256).

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

20858240288 is a wasteful number, since it uses less digits than its factorization.

20858240288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429765 (or 429757 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 47.

The spelling of 20858240288 in words is "twenty billion, eight hundred fifty-eight million, two hundred forty thousand, two hundred eighty-eight".