20847244 has 24 divisors (see below), whose sum is σ = 39992400. Its totient is φ = 9430080.

The previous prime is 20847241. The next prime is 20847247. The reversal of 20847244 is 44274802.

It is an interprime number because it is at equal distance from previous prime (20847241) and next prime (20847247).

It is not an unprimeable number, because it can be changed into a prime (20847241) 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, 9042 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (1666350).

Almost surely, 2^20847244 is an apocalyptic number.

It is an amenable number.

20847244 is a deficient number, since it is larger than the sum of its proper divisors (19145156).

20847244 is a wasteful number, since it uses less digits than its factorization.

20847244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 20847244 is about 4565.8782287748. The cubic root of 20847244 is about 275.2218331279.

The spelling of 20847244 in words is "twenty million, eight hundred forty-seven thousand, two hundred forty-four".