20147248 has 20 divisors (see below), whose sum is σ = 42584328. Its totient is φ = 9157760.

The previous prime is 20147221. The next prime is 20147251. The reversal of 20147248 is 84274102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57061 + ... + 57412.

Almost surely, 2^20147248 is an apocalyptic number.

It is an amenable number.

20147248 is an abundant number, since it is smaller than the sum of its proper divisors (22437080).

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

20147248 is a wasteful number, since it uses less digits than its factorization.

20147248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114492 (or 114486 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20147248 is about 4488.5685914331. The cubic root of 20147248 is about 272.1062877576.

The spelling of 20147248 in words is "twenty million, one hundred forty-seven thousand, two hundred forty-eight".