20257682 has 4 divisors (see below), whose sum is σ = 30386526. Its totient is φ = 10128840.

The previous prime is 20257669. The next prime is 20257697. The reversal of 20257682 is 28675202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16801801 + 3455881 = 4099^2 + 1859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5064419 + ... + 5064422.

Almost surely, 2^20257682 is an apocalyptic number.

20257682 is a deficient number, since it is larger than the sum of its proper divisors (10128844).

20257682 is a wasteful number, since it uses less digits than its factorization.

20257682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10128843.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20257682 is about 4500.8534746201. The cubic root of 20257682 is about 272.6025515312.

The spelling of 20257682 in words is "twenty million, two hundred fifty-seven thousand, six hundred eighty-two".