20135404 has 12 divisors (see below), whose sum is σ = 35299264. Its totient is φ = 10049904.

The previous prime is 20135377. The next prime is 20135431. The reversal of 20135404 is 40453102.

It is an interprime number because it is at equal distance from previous prime (20135377) and next prime (20135431).

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, 1719 + ... + 6574.

Almost surely, 2^20135404 is an apocalyptic number.

It is an amenable number.

20135404 is a deficient number, since it is larger than the sum of its proper divisors (15163860).

20135404 is a wasteful number, since it uses less digits than its factorization.

20135404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904 (or 8902 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20135404 is about 4487.2490459077. The cubic root of 20135404 is about 272.0529560964.

Adding to 20135404 its reverse (40453102), we get a palindrome (60588506).

It can be divided in two parts, 20 and 135404, that added together give a square (135424 = 368²).

The spelling of 20135404 in words is "twenty million, one hundred thirty-five thousand, four hundred four".