20161467648 has 180 divisors, whose sum is σ = 68706607200. Its totient is φ = 5760377856.

The previous prime is 20161467539. The next prime is 20161467649. The reversal of 20161467648 is 84676416102.

20161467648 is a `hidden beast` number, since 20 + 1 + 614 + 6 + 7 + 6 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161467649) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75703 + ... + 214601.

Almost surely, 2^20161467648 is an apocalyptic number.

20161467648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20161467648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34353303600).

20161467648 is an abundant number, since it is smaller than the sum of its proper divisors (48545139552).

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

20161467648 is an equidigital number, since it uses as much as digits as its factorization.

20161467648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138934 (or 138911 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20161467648 in words is "twenty billion, one hundred sixty-one million, four hundred sixty-seven thousand, six hundred forty-eight".