20675857 has 8 divisors (see below), whose sum is σ = 22010400. Its totient is φ = 19365984.

The previous prime is 20675813. The next prime is 20675917. The reversal of 20675857 is 75857602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20675857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20675957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4423 + ... + 7804.

It is an arithmetic number, because the mean of its divisors is an integer number (2751300).

Almost surely, 2^20675857 is an apocalyptic number.

It is an amenable number.

20675857 is a deficient number, since it is larger than the sum of its proper divisors (1334543).

20675857 is a wasteful number, since it uses less digits than its factorization.

20675857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12335.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 20675857 is about 4547.0712552147. The cubic root of 20675857 is about 274.4655493188.

The spelling of 20675857 in words is "twenty million, six hundred seventy-five thousand, eight hundred fifty-seven".