20040105 has 32 divisors (see below), whose sum is σ = 33619968. Its totient is φ = 10180800.

The previous prime is 20040071. The next prime is 20040133. The reversal of 20040105 is 50104002.

It is not a de Polignac number, because 20040105 - 2¹⁴ = 20023721 is a prime.

It is a super-2 number, since 2×20040105² = 803211616822050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32712 + ... + 33318.

It is an arithmetic number, because the mean of its divisors is an integer number (1050624).

Almost surely, 2^20040105 is an apocalyptic number.

It is an amenable number.

20040105 is a deficient number, since it is larger than the sum of its proper divisors (13579863).

20040105 is a wasteful number, since it uses less digits than its factorization.

20040105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20040105 is about 4476.6175847396. The cubic root of 20040105 is about 271.6230767170.

Adding to 20040105 its reverse (50104002), we get a palindrome (70144107).

The spelling of 20040105 in words is "twenty million, forty thousand, one hundred five".