20840248 has 32 divisors (see below), whose sum is σ = 45909360. Its totient is φ = 8743680.

The previous prime is 20840233. The next prime is 20840263. The reversal of 20840248 is 84204802.

It is an interprime number because it is at equal distance from previous prime (20840233) and next prime (20840263).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7965 + ... + 10252.

Almost surely, 2^20840248 is an apocalyptic number.

It is an amenable number.

20840248 is an abundant number, since it is smaller than the sum of its proper divisors (25069112).

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

20840248 is a wasteful number, since it uses less digits than its factorization.

20840248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18247 (or 18243 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 20840248 is about 4565.1120468177. The cubic root of 20840248 is about 275.1910430089.

The spelling of 20840248 in words is "twenty million, eight hundred forty thousand, two hundred forty-eight".