20257677 has 12 divisors (see below), whose sum is σ = 31921344. Its totient is φ = 12277320.

The previous prime is 20257669. The next prime is 20257697. The reversal of 20257677 is 77675202.

It is not a de Polignac number, because 20257677 - 2³ = 20257669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257697) 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 11 ways as a sum of consecutive naturals, for example, 102213 + ... + 102410.

It is an arithmetic number, because the mean of its divisors is an integer number (2660112).

Almost surely, 2^20257677 is an apocalyptic number.

It is an amenable number.

20257677 is a deficient number, since it is larger than the sum of its proper divisors (11663667).

20257677 is a wasteful number, since it uses less digits than its factorization.

20257677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204640 (or 204637 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 20257677 is about 4500.8529191699. The cubic root of 20257677 is about 272.6025291033.

The spelling of 20257677 in words is "twenty million, two hundred fifty-seven thousand, six hundred seventy-seven".