20438288064 has 70 divisors (see below), whose sum is σ = 60585503924. Its totient is φ = 6812760960.

The previous prime is 20438288009. The next prime is 20438288069. The reversal of 20438288064 is 46088283402.

20438288064 is a `hidden beast` number, since 204 + 382 + 8 + 8 + 0 + 64 = 666.

It is not an unprimeable number, because it can be changed into a prime (20438288069) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1966102 + ... + 1976469.

Almost surely, 2^20438288064 is an apocalyptic number.

20438288064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20438288064 is an abundant number, since it is smaller than the sum of its proper divisors (40147215860).

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

20438288064 is an equidigital number, since it uses as much as digits as its factorization.

20438288064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942595 (or 3942576 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 20438288064 in words is "twenty billion, four hundred thirty-eight million, two hundred eighty-eight thousand, sixty-four".