20257106 has 8 divisors (see below), whose sum is σ = 30430080. Its totient is φ = 10113748.

The previous prime is 20257099. The next prime is 20257117. The reversal of 20257106 is 60175202.

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

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, 5606 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (3803760).

Almost surely, 2^20257106 is an apocalyptic number.

20257106 is a deficient number, since it is larger than the sum of its proper divisors (10172974).

20257106 is a wasteful number, since it uses less digits than its factorization.

20257106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14808.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20257106 is about 4500.7894863013. The cubic root of 20257106 is about 272.5999678108.

The spelling of 20257106 in words is "twenty million, two hundred fifty-seven thousand, one hundred six".