20326415648 has 48 divisors (see below), whose sum is σ = 49892117184. Its totient is φ = 7919381760.

The previous prime is 20326415639. The next prime is 20326415651. The reversal of 20326415648 is 84651462302.

It is a super-3 number, since 3×20326415648³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4122215 + ... + 4127142.

It is an arithmetic number, because the mean of its divisors is an integer number (1039419108).

Almost surely, 2^20326415648 is an apocalyptic number.

20326415648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20326415648 is an abundant number, since it is smaller than the sum of its proper divisors (29565701536).

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

20326415648 is a wasteful number, since it uses less digits than its factorization.

20326415648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249385 (or 8249377 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 20326415648 in words is "twenty billion, three hundred twenty-six million, four hundred fifteen thousand, six hundred forty-eight".