20412145 has 16 divisors (see below), whose sum is σ = 26756352. Its totient is φ = 14857920.

The previous prime is 20412113. The next prime is 20412149. The reversal of 20412145 is 54121402.

It is not a de Polignac number, because 20412145 - 2⁵ = 20412113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412149) 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, 2404 + ... + 6826.

It is an arithmetic number, because the mean of its divisors is an integer number (1672272).

Almost surely, 2^20412145 is an apocalyptic number.

It is an amenable number.

20412145 is a deficient number, since it is larger than the sum of its proper divisors (6344207).

20412145 is a wasteful number, since it uses less digits than its factorization.

20412145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20412145 is about 4517.9801903063. The cubic root of 20412145 is about 273.2936545946.

Adding to 20412145 its reverse (54121402), we get a palindrome (74533547).

It can be divided in two parts, 2041 and 2145, that added together give a triangular number (4186 = T₉₁).

The spelling of 20412145 in words is "twenty million, four hundred twelve thousand, one hundred forty-five".