20418605568 has 240 divisors, whose sum is σ = 60163399296. Its totient is φ = 6665379840.

The previous prime is 20418605561. The next prime is 20418605573. The reversal of 20418605568 is 86550681402.

20418605568 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 86 + 0 + 5 + 568 = 666.

It is not an unprimeable number, because it can be changed into a prime (20418605561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75345273 + ... + 75345543.

Almost surely, 2^20418605568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20418605568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30081699648).

20418605568 is an abundant number, since it is smaller than the sum of its proper divisors (39744793728).

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

20418605568 is a wasteful number, since it uses less digits than its factorization.

20418605568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 20418605568 in words is "twenty billion, four hundred eighteen million, six hundred five thousand, five hundred sixty-eight".