20671056 has 60 divisors (see below), whose sum is σ = 66117792. Its totient is φ = 5905728.

The previous prime is 20671033. The next prime is 20671073. The reversal of 20671056 is 65017602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9246 + ... + 11261.

Almost surely, 2^20671056 is an apocalyptic number.

It is an amenable number.

20671056 is an abundant number, since it is smaller than the sum of its proper divisors (45446736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20671056 is a wasteful number, since it uses less digits than its factorization.

20671056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20528 (or 20519 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20671056 is about 4546.5433023342. The cubic root of 20671056 is about 274.4443037487. Note that the first 3 decimals are identical.

Adding to 20671056 its reverse (65017602), we get a palindrome (85688658).

The spelling of 20671056 in words is "twenty million, six hundred seventy-one thousand, fifty-six".