20412818 has 32 divisors (see below), whose sum is σ = 33965568. Its totient is φ = 9158400.

The previous prime is 20412817. The next prime is 20412871. The reversal of 20412818 is 81821402.

It is a super-2 number, since 2×20412818² = 833366277402248, which contains 22 as substring.

It is a Curzon number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112688 + ... + 112868.

It is an arithmetic number, because the mean of its divisors is an integer number (1061424).

Almost surely, 2^20412818 is an apocalyptic number.

20412818 is a deficient number, since it is larger than the sum of its proper divisors (13552750).

20412818 is a wasteful number, since it uses less digits than its factorization.

20412818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 20412818 is about 4518.0546698773. The cubic root of 20412818 is about 273.2966581105.

The spelling of 20412818 in words is "twenty million, four hundred twelve thousand, eight hundred eighteen".