20355146 has 8 divisors (see below), whose sum is σ = 34894560. Its totient is φ = 8723628.

The previous prime is 20355133. The next prime is 20355149. The reversal of 20355146 is 64155302.

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

It is not an unprimeable number, because it can be changed into a prime (20355149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726956 + ... + 726983.

It is an arithmetic number, because the mean of its divisors is an integer number (4361820).

Almost surely, 2^20355146 is an apocalyptic number.

20355146 is a deficient number, since it is larger than the sum of its proper divisors (14539414).

20355146 is a wasteful number, since it uses less digits than its factorization.

20355146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453948.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20355146 is about 4511.6677625907. The cubic root of 20355146 is about 273.0390351496.

The spelling of 20355146 in words is "twenty million, three hundred fifty-five thousand, one hundred forty-six".