20857414 has 16 divisors (see below), whose sum is σ = 31882752. Its totient is φ = 10231488.

The previous prime is 20857393. The next prime is 20857429. The reversal of 20857414 is 41475802.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 54267 + ... + 54649.

It is an arithmetic number, because the mean of its divisors is an integer number (1992672).

Almost surely, 2^20857414 is an apocalyptic number.

20857414 is a deficient number, since it is larger than the sum of its proper divisors (11025338).

20857414 is a wasteful number, since it uses less digits than its factorization.

20857414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 20857414 is about 4566.9917889131. The cubic root of 20857414 is about 275.2665800661.

The spelling of 20857414 in words is "twenty million, eight hundred fifty-seven thousand, four hundred fourteen".