20004575 has 12 divisors (see below), whose sum is σ = 24899448. Its totient is φ = 15943200.

The previous prime is 20004559. The next prime is 20004581. The reversal of 20004575 is 57540002.

It is not a de Polignac number, because 20004575 - 2⁴ = 20004559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20004575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5960 + ... + 8690.

It is an arithmetic number, because the mean of its divisors is an integer number (2074954).

Almost surely, 2^20004575 is an apocalyptic number.

20004575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20004575 is a deficient number, since it is larger than the sum of its proper divisors (4894873).

20004575 is a wasteful number, since it uses less digits than its factorization.

20004575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20004575 is about 4472.6474263013. The cubic root of 20004575 is about 271.4624575158.

Adding to 20004575 its product of nonzero digits (1400), we get a triangular number (20005975 = T₆₃₂₅).

Adding to 20004575 its reverse (57540002), we get a palindrome (77544577).

The spelling of 20004575 in words is "twenty million, four thousand, five hundred seventy-five".