20530004 has 24 divisors (see below), whose sum is σ = 39311328. Its totient is φ = 9303840.

The previous prime is 20529991. The next prime is 20530019. The reversal of 20530004 is 40003502.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 23642 + ... + 24494.

It is an arithmetic number, because the mean of its divisors is an integer number (1637972).

Almost surely, 2^20530004 is an apocalyptic number.

It is an amenable number.

20530004 is a deficient number, since it is larger than the sum of its proper divisors (18781324).

20530004 is a wasteful number, since it uses less digits than its factorization.

20530004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20530004 is about 4531.0047450869. The cubic root of 20530004 is about 273.8186414194.

Adding to 20530004 its reverse (40003502), we get a palindrome (60533506).

The spelling of 20530004 in words is "twenty million, five hundred thirty thousand, four".