20912148 has 48 divisors (see below), whose sum is σ = 54519360. Its totient is φ = 6931872.

The previous prime is 20912123. The next prime is 20912149. The reversal of 20912148 is 84121902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912149) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24090 + ... + 24942.

It is an arithmetic number, because the mean of its divisors is an integer number (1135820).

Almost surely, 2^20912148 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 20912148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27259680).

20912148 is an abundant number, since it is smaller than the sum of its proper divisors (33607212).

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

20912148 is a wasteful number, since it uses less digits than its factorization.

20912148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 20912148 is about 4572.9802098850. The cubic root of 20912148 is about 275.5071544898.

The spelling of 20912148 in words is "twenty million, nine hundred twelve thousand, one hundred forty-eight".