20857196 has 24 divisors (see below), whose sum is σ = 38208240. Its totient is φ = 9951552.

The previous prime is 20857183. The next prime is 20857211. The reversal of 20857196 is 69175802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6515 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (1592010).

Almost surely, 2^20857196 is an apocalyptic number.

It is an amenable number.

20857196 is a deficient number, since it is larger than the sum of its proper divisors (17351044).

20857196 is a wasteful number, since it uses less digits than its factorization.

20857196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 20857196 is about 4566.9679219368. The cubic root of 20857196 is about 275.2656210414.

The spelling of 20857196 in words is "twenty million, eight hundred fifty-seven thousand, one hundred ninety-six".