20257006 has 32 divisors (see below), whose sum is σ = 38131200. Its totient is φ = 7840800.

The previous prime is 20256967. The next prime is 20257067. The reversal of 20257006 is 60075202.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 30316 + ... + 30976.

It is an arithmetic number, because the mean of its divisors is an integer number (1191600).

Almost surely, 2^20257006 is an apocalyptic number.

20257006 is a deficient number, since it is larger than the sum of its proper divisors (17874194).

20257006 is a wasteful number, since it uses less digits than its factorization.

20257006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20257006 is about 4500.7783771255. The cubic root of 20257006 is about 272.5995192433.

The spelling of 20257006 in words is "twenty million, two hundred fifty-seven thousand, six".