20135446 has 8 divisors (see below), whose sum is σ = 31979880. Its totient is φ = 9475488.

The previous prime is 20135431. The next prime is 20135447. The reversal of 20135446 is 64453102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20135446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296076 + ... + 296143.

It is an arithmetic number, because the mean of its divisors is an integer number (3997485).

Almost surely, 2^20135446 is an apocalyptic number.

20135446 is a deficient number, since it is larger than the sum of its proper divisors (11844434).

20135446 is a wasteful number, since it uses less digits than its factorization.

20135446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592238.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20135446 is about 4487.2537258328. The cubic root of 20135446 is about 272.0531452527.

Adding to 20135446 its reverse (64453102), we get a palindrome (84588548).

The spelling of 20135446 in words is "twenty million, one hundred thirty-five thousand, four hundred forty-six".