20715056 has 10 divisors (see below), whose sum is σ = 40135452. Its totient is φ = 10357520.

The previous prime is 20715043. The next prime is 20715059. The reversal of 20715056 is 65051702.

It is a super-3 number, since 3×20715056³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20715059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647330 + ... + 647361.

Almost surely, 2^20715056 is an apocalyptic number.

It is an amenable number.

20715056 is a deficient number, since it is larger than the sum of its proper divisors (19420396).

20715056 is a wasteful number, since it uses less digits than its factorization.

20715056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294699 (or 1294693 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20715056 is about 4551.3795710751. The cubic root of 20715056 is about 274.6388913169.

Adding to 20715056 its reverse (65051702), we get a palindrome (85766758).

The spelling of 20715056 in words is "twenty million, seven hundred fifteen thousand, fifty-six".