20748144 has 40 divisors (see below), whose sum is σ = 53809552. Its totient is φ = 6888960.

The previous prime is 20748121. The next prime is 20748151. The reversal of 20748144 is 44184702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14334 + ... + 15714.

Almost surely, 2^20748144 is an apocalyptic number.

20748144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20748144 is an abundant number, since it is smaller than the sum of its proper divisors (33061408).

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

20748144 is a wasteful number, since it uses less digits than its factorization.

20748144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1699 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 20748144 is about 4555.0130625499. The cubic root of 20748144 is about 274.7850397285.

The spelling of 20748144 in words is "twenty million, seven hundred forty-eight thousand, one hundred forty-four".