20611045 has 32 divisors (see below), whose sum is σ = 30820608. Its totient is φ = 12883968.

The previous prime is 20611033. The next prime is 20611057. The reversal of 20611045 is 54011602.

It is an interprime number because it is at equal distance from previous prime (20611033) and next prime (20611057).

It is a cyclic number.

It is not a de Polignac number, because 20611045 - 2⁷ = 20610917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43902 + ... + 44368.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^20611045 is an apocalyptic number.

It is an amenable number.

20611045 is a deficient number, since it is larger than the sum of its proper divisors (10209563).

20611045 is a wasteful number, since it uses less digits than its factorization.

20611045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20611045 is about 4539.9388762405. The cubic root of 20611045 is about 274.1784627776.

Adding to 20611045 its reverse (54011602), we get a palindrome (74622647).

It can be divided in two parts, 20 and 611045, that added together give a triangular number (611065 = T₁₁₀₅).

The spelling of 20611045 in words is "twenty million, six hundred eleven thousand, forty-five".