20923148 has 12 divisors (see below), whose sum is σ = 36685152. Its totient is φ = 10441680.

The previous prime is 20923121. The next prime is 20923151. The reversal of 20923148 is 84132902.

It is a self number, because there is not a number n which added to its sum of digits gives 20923148.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 6923.

It is an arithmetic number, because the mean of its divisors is an integer number (3057096).

Almost surely, 2^20923148 is an apocalyptic number.

It is an amenable number.

20923148 is a deficient number, since it is larger than the sum of its proper divisors (15762004).

20923148 is a wasteful number, since it uses less digits than its factorization.

20923148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952 (or 9950 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20923148 is about 4574.1827685391. The cubic root of 20923148 is about 275.5554525330. Note that the first 3 decimals are identical.

The spelling of 20923148 in words is "twenty million, nine hundred twenty-three thousand, one hundred forty-eight".