20285907 has 8 divisors (see below), whose sum is σ = 27429120. Its totient is φ = 13333320.

The previous prime is 20285899. The next prime is 20285921. The reversal of 20285907 is 70958202.

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

It is not a de Polignac number, because 20285907 - 2³ = 20285899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20285927) 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 7 ways as a sum of consecutive naturals, for example, 47407 + ... + 47832.

It is an arithmetic number, because the mean of its divisors is an integer number (3428640).

Almost surely, 2^20285907 is an apocalyptic number.

20285907 is a deficient number, since it is larger than the sum of its proper divisors (7143213).

20285907 is an equidigital number, since it uses as much as digits as its factorization.

20285907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95313.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20285907 is about 4503.9878996285. The cubic root of 20285907 is about 272.7290983615.

The spelling of 20285907 in words is "twenty million, two hundred eighty-five thousand, nine hundred seven".