20118672 has 80 divisors (see below), whose sum is σ = 66007680. Its totient is φ = 5747328.

The previous prime is 20118661. The next prime is 20118677. The reversal of 20118672 is 27681102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20118677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (825096).

Almost surely, 2^20118672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20118672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33003840).

20118672 is an abundant number, since it is smaller than the sum of its proper divisors (45889008).

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

20118672 is a wasteful number, since it uses less digits than its factorization.

20118672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677 (or 6665 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 20118672 is about 4485.3842644750. The cubic root of 20118672 is about 271.9775788900.

Adding to 20118672 its reverse (27681102), we get a palindrome (47799774).

The spelling of 20118672 in words is "twenty million, one hundred eighteen thousand, six hundred seventy-two".