20011045 has 4 divisors (see below), whose sum is σ = 24013260. Its totient is φ = 16008832.

The previous prime is 20011037. The next prime is 20011067. The reversal of 20011045 is 54011002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15626209 + 4384836 = 3953^2 + 2094^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011045 - 2³ = 20011037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001100 + ... + 2001109.

It is an arithmetic number, because the mean of its divisors is an integer number (6003315).

Almost surely, 2^20011045 is an apocalyptic number.

It is an amenable number.

20011045 is a deficient number, since it is larger than the sum of its proper divisors (4002215).

20011045 is an equidigital number, since it uses as much as digits as its factorization.

20011045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002214.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20011045 is about 4473.3706530982. The cubic root of 20011045 is about 271.4917203683.

Adding to 20011045 its reverse (54011002), we get a palindrome (74022047).

The spelling of 20011045 in words is "twenty million, eleven thousand, forty-five".