20847016 has 32 divisors (see below), whose sum is σ = 41135040. Its totient is φ = 9885568.

The previous prime is 20847007. The next prime is 20847017. The reversal of 20847016 is 61074802.

It is a super-2 number, since 2×20847016² = 869196152208512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20847017) 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, 24795 + ... + 25621.

It is an arithmetic number, because the mean of its divisors is an integer number (1285470).

Almost surely, 2^20847016 is an apocalyptic number.

It is an amenable number.

20847016 is a deficient number, since it is larger than the sum of its proper divisors (20288024).

20847016 is a wasteful number, since it uses less digits than its factorization.

20847016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20847016 is about 4565.8532608922. The cubic root of 20847016 is about 275.2208297849.

The spelling of 20847016 in words is "twenty million, eight hundred forty-seven thousand, sixteen".