21074148 has 24 divisors (see below), whose sum is σ = 54636960. Its totient is φ = 7024680.

The previous prime is 21074147. The next prime is 21074153. The reversal of 21074148 is 84147012.

It is a super-3 number, since 3×21074148³ (a number of 23 digits) contains 333 as substring.

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 (21074147) 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, 97458 + ... + 97673.

It is an arithmetic number, because the mean of its divisors is an integer number (2276540).

Almost surely, 2^21074148 is an apocalyptic number.

It is an amenable number.

21074148 is an abundant number, since it is smaller than the sum of its proper divisors (33562812).

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

21074148 is a wasteful number, since it uses less digits than its factorization.

21074148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195144 (or 195136 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 21074148 is about 4590.6587762542. The cubic root of 21074148 is about 276.2167484530.

The spelling of 21074148 in words is "twenty-one million, seventy-four thousand, one hundred forty-eight".