20045006 has 16 divisors (see below), whose sum is σ = 33221664. Its totient is φ = 9022464.

The previous prime is 20044987. The next prime is 20045017. The reversal of 20045006 is 60054002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12035 + ... + 13598.

It is an arithmetic number, because the mean of its divisors is an integer number (2076354).

Almost surely, 2^20045006 is an apocalyptic number.

20045006 is a deficient number, since it is larger than the sum of its proper divisors (13176658).

20045006 is a wasteful number, since it uses less digits than its factorization.

20045006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25675.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20045006 is about 4477.1649511717. The cubic root of 20045006 is about 271.6452175888.

Adding to 20045006 its reverse (60054002), we get a palindrome (80099008).

The spelling of 20045006 in words is "twenty million, forty-five thousand, six".