20477744160 has 192 divisors, whose sum is σ = 65297498112. Its totient is φ = 5394041856.

The previous prime is 20477744159. The next prime is 20477744197. The reversal of 20477744160 is 6144777402.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17251087 + ... + 17252273.

It is an arithmetic number, because the mean of its divisors is an integer number (340091136).

Almost surely, 2^20477744160 is an apocalyptic number.

20477744160 is a gapful number since it is divisible by the number (20) 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 20477744160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32648749056).

20477744160 is an abundant number, since it is smaller than the sum of its proper divisors (44819753952).

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

20477744160 is a wasteful number, since it uses less digits than its factorization.

20477744160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 42.

The spelling of 20477744160 in words is "twenty billion, four hundred seventy-seven million, seven hundred forty-four thousand, one hundred sixty".