20181248 has 36 divisors (see below), whose sum is σ = 41599488. Its totient is φ = 9761280.

The previous prime is 20181247. The next prime is 20181311. The reversal of 20181248 is 84218102.

It is not an unprimeable number, because it can be changed into a prime (20181247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6665 + ... + 9207.

Almost surely, 2^20181248 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 20181248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20799744).

20181248 is an abundant number, since it is smaller than the sum of its proper divisors (21418240).

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

20181248 is an equidigital number, since it uses as much as digits as its factorization.

20181248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 20181248 is about 4492.3543938563. The cubic root of 20181248 is about 272.2592683598.

The spelling of 20181248 in words is "twenty million, one hundred eighty-one thousand, two hundred forty-eight".