20857150 has 48 divisors (see below), whose sum is σ = 40510800. Its totient is φ = 7983360.

The previous prime is 20857103. The next prime is 20857157. The reversal of 20857150 is 5175802.

It is a super-2 number, since 2×20857150² = 870041412245000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20857157) 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 23 ways as a sum of consecutive naturals, for example, 191296 + ... + 191404.

It is an arithmetic number, because the mean of its divisors is an integer number (843975).

Almost surely, 2^20857150 is an apocalyptic number.

20857150 is a deficient number, since it is larger than the sum of its proper divisors (19653650).

20857150 is a wasteful number, since it uses less digits than its factorization.

20857150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 20857150 is about 4566.9628857699. The cubic root of 20857150 is about 275.2654186775.

The spelling of 20857150 in words is "twenty million, eight hundred fifty-seven thousand, one hundred fifty".