20057004 has 48 divisors (see below), whose sum is σ = 56730240. Its totient is φ = 6077520.

The previous prime is 20056979. The next prime is 20057021. The reversal of 20057004 is 40075002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7254 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (1181880).

Almost surely, 2^20057004 is an apocalyptic number.

It is an amenable number.

20057004 is an abundant number, since it is smaller than the sum of its proper divisors (36673236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20057004 is a wasteful number, since it uses less digits than its factorization.

20057004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16907 (or 16899 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20057004 is about 4478.5046611564. The cubic root of 20057004 is about 271.6994048058.

It can be divided in two parts, 2005 and 7004, that added together give a palindrome (9009).

The spelling of 20057004 in words is "twenty million, fifty-seven thousand, four".