20445061 has 16 divisors (see below), whose sum is σ = 25312000. Its totient is φ = 16080768.

The previous prime is 20445041. The next prime is 20445071. The reversal of 20445061 is 16054402.

It is a cyclic number.

It is not a de Polignac number, because 20445061 - 2⁷ = 20444933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445001) 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, 17545 + ... + 18673.

It is an arithmetic number, because the mean of its divisors is an integer number (1582000).

Almost surely, 2^20445061 is an apocalyptic number.

It is an amenable number.

20445061 is a deficient number, since it is larger than the sum of its proper divisors (4866939).

20445061 is a wasteful number, since it uses less digits than its factorization.

20445061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20445061 is about 4521.6215011874. The cubic root of 20445061 is about 273.4404773619.

Adding to 20445061 its reverse (16054402), we get a palindrome (36499463).

The spelling of 20445061 in words is "twenty million, four hundred forty-five thousand, sixty-one".