20404052 has 12 divisors (see below), whose sum is σ = 36938580. Its totient is φ = 9850176.

The previous prime is 20404049. The next prime is 20404093. The reversal of 20404052 is 25040402.

It can be written as a sum of positive squares in 2 ways, for example, as 5550736 + 14853316 = 2356^2 + 3854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20404052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87833 + ... + 88064.

It is an arithmetic number, because the mean of its divisors is an integer number (3078215).

Almost surely, 2^20404052 is an apocalyptic number.

It is an amenable number.

20404052 is a deficient number, since it is larger than the sum of its proper divisors (16534528).

20404052 is a wasteful number, since it uses less digits than its factorization.

20404052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175930 (or 175928 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20404052 is about 4517.0844579219. The cubic root of 20404052 is about 273.2575313631.

Adding to 20404052 its reverse (25040402), we get a palindrome (45444454).

The spelling of 20404052 in words is "twenty million, four hundred four thousand, fifty-two".