20412816 has 40 divisors (see below), whose sum is σ = 53076960. Its totient is φ = 6759936.

The previous prime is 20412811. The next prime is 20412817. The reversal of 20412816 is 61821402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20412811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6520 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (1326924).

Almost surely, 2^20412816 is an apocalyptic number.

It is an amenable number.

20412816 is an abundant number, since it is smaller than the sum of its proper divisors (32664144).

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

20412816 is a wasteful number, since it uses less digits than its factorization.

20412816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783 (or 2777 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20412816 is about 4518.0544485431. The cubic root of 20412816 is about 273.2966491848.

The spelling of 20412816 in words is "twenty million, four hundred twelve thousand, eight hundred sixteen".