20572004 has 12 divisors (see below), whose sum is σ = 36043644. Its totient is φ = 10273824.

The previous prime is 20571997. The next prime is 20572007. The reversal of 20572004 is 40027502.

It can be written as a sum of positive squares in 2 ways, for example, as 9012004 + 11560000 = 3002^2 + 3400^2 .

It is not an unprimeable number, because it can be changed into a prime (20572007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (3003637).

Almost surely, 2^20572004 is an apocalyptic number.

It is an amenable number.

20572004 is a deficient number, since it is larger than the sum of its proper divisors (15471640).

20572004 is a wasteful number, since it uses less digits than its factorization.

20572004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094 (or 6092 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20572004 is about 4535.6371107045. The cubic root of 20572004 is about 274.0052390353.

Adding to 20572004 its reverse (40027502), we get a palindrome (60599506).

The spelling of 20572004 in words is "twenty million, five hundred seventy-two thousand, four".