20160883840 has 64 divisors (see below), whose sum is σ = 48293703360. Its totient is φ = 8048192512.

The previous prime is 20160883829. The next prime is 20160883849. The reversal of 20160883840 is 4838806102.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20160883840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 20160883793 and 20160883802.

It is not an unprimeable number, because it can be changed into a prime (20160883849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290607 + ... + 353233.

It is an arithmetic number, because the mean of its divisors is an integer number (754589115).

Almost surely, 2^20160883840 is an apocalyptic number.

20160883840 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 20160883840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24146851680).

20160883840 is an abundant number, since it is smaller than the sum of its proper divisors (28132819520).

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

20160883840 is an equidigital number, since it uses as much as digits as its factorization.

20160883840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63149 (or 63137 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 20160883840 in words is "twenty billion, one hundred sixty million, eight hundred eighty-three thousand, eight hundred forty".