20801412 has 18 divisors (see below), whose sum is σ = 52581438. Its totient is φ = 6933792.

The previous prime is 20801393. The next prime is 20801413. The reversal of 20801412 is 21410802.

It can be written as a sum of positive squares in only one way, i.e., 10458756 + 10342656 = 3234^2 + 3216^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20801413) 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 5 ways as a sum of consecutive naturals, for example, 288873 + ... + 288944.

It is an arithmetic number, because the mean of its divisors is an integer number (2921191).

Almost surely, 2^20801412 is an apocalyptic number.

It is an amenable number.

20801412 is an abundant number, since it is smaller than the sum of its proper divisors (31780026).

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

20801412 is a wasteful number, since it uses less digits than its factorization.

20801412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577827 (or 577822 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20801412 is about 4560.8564985099. The cubic root of 20801412 is about 275.0199963421.

The spelling of 20801412 in words is "twenty million, eight hundred one thousand, four hundred twelve".