20450618370 has 640 divisors, whose sum is σ = 71061484032. Its totient is φ = 4105728000.

The previous prime is 20450618359. The next prime is 20450618371. The reversal of 20450618370 is 7381605402.

20450618370 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 0 + 618 + 37 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (20450618371) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 202481320 + ... + 202481420.

Almost surely, 2^20450618370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20450618370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35530742016).

20450618370 is an abundant number, since it is smaller than the sum of its proper divisors (50610865662).

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

20450618370 is a wasteful number, since it uses less digits than its factorization.

20450618370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20450618370 in words is "twenty billion, four hundred fifty million, six hundred eighteen thousand, three hundred seventy".