20355234 has 8 divisors (see below), whose sum is σ = 40710480. Its totient is φ = 6785076.

The previous prime is 20355221. The next prime is 20355241. The reversal of 20355234 is 43255302.

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

20355234 is an admirable number.

It is an unprimeable number.

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, 1696264 + ... + 1696275.

It is an arithmetic number, because the mean of its divisors is an integer number (5088810).

Almost surely, 2^20355234 is an apocalyptic number.

20355234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20355234 is a wasteful number, since it uses less digits than its factorization.

20355234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392544.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 20355234 is about 4511.6775150713. The cubic root of 20355234 is about 273.0394286193.

The spelling of 20355234 in words is "twenty million, three hundred fifty-five thousand, two hundred thirty-four".