20352906 has 24 divisors (see below), whose sum is σ = 50397984. Its totient is φ = 5815080.

The previous prime is 20352887. The next prime is 20352919. The reversal of 20352906 is 60925302.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20352906.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 80640 + ... + 80891.

It is an arithmetic number, because the mean of its divisors is an integer number (2099916).

Almost surely, 2^20352906 is an apocalyptic number.

20352906 is an abundant number, since it is smaller than the sum of its proper divisors (30045078).

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

20352906 is a wasteful number, since it uses less digits than its factorization.

20352906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161546 (or 161543 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20352906 is about 4511.4195105310. The cubic root of 20352906 is about 273.0290191750.

The spelling of 20352906 in words is "twenty million, three hundred fifty-two thousand, nine hundred six".