20008216944 has 100 divisors (see below), whose sum is σ = 57981757680. Its totient is φ = 6661094400.

The previous prime is 20008216919. The next prime is 20008216957. The reversal of 20008216944 is 44961280002.

It is a super-3 number, since 3×20008216944³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20008216899 and 20008216908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1078144 + ... + 1096544.

Almost surely, 2^20008216944 is an apocalyptic number.

20008216944 is a gapful number since it is divisible by the number (24) 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 20008216944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28990878840).

20008216944 is an abundant number, since it is smaller than the sum of its proper divisors (37973540736).

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

20008216944 is a wasteful number, since it uses less digits than its factorization.

20008216944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19260 (or 19245 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

Adding to 20008216944 its reverse (44961280002), we get a palindrome (64969496946).

The spelling of 20008216944 in words is "twenty billion, eight million, two hundred sixteen thousand, nine hundred forty-four".