20118912 has 96 divisors (see below), whose sum is σ = 58876440. Its totient is φ = 6082560.

The previous prime is 20118911. The next prime is 20118913. The reversal of 20118912 is 21981102.

It is an interprime number because it is at equal distance from previous prime (20118911) and next prime (20118913).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46248 + ... + 46680.

Almost surely, 2^20118912 is an apocalyptic number.

20118912 is a gapful number since it is divisible by the number (22) 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 20118912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29438220).

20118912 is an abundant number, since it is smaller than the sum of its proper divisors (38757528).

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

20118912 is a wasteful number, since it uses less digits than its factorization.

20118912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 20118912 is about 4485.4110179559. The cubic root of 20118912 is about 271.9786603789.

The spelling of 20118912 in words is "twenty million, one hundred eighteen thousand, nine hundred twelve".