20138248 has 32 divisors (see below), whose sum is σ = 42436800. Its totient is φ = 8889408.

The previous prime is 20138243. The next prime is 20138269. The reversal of 20138248 is 84283102.

It is not an unprimeable number, because it can be changed into a prime (20138243) 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, 1818 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (1326150).

Almost surely, 2^20138248 is an apocalyptic number.

It is an amenable number.

20138248 is an abundant number, since it is smaller than the sum of its proper divisors (22298552).

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

20138248 is a wasteful number, since it uses less digits than its factorization.

20138248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8461 (or 8457 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20138248 is about 4487.5659326633. The cubic root of 20138248 is about 272.0657640868.

The spelling of 20138248 in words is "twenty million, one hundred thirty-eight thousand, two hundred forty-eight".