20625517 has 8 divisors (see below), whose sum is σ = 22620672. Its totient is φ = 18650400.

The previous prime is 20625499. The next prime is 20625529. The reversal of 20625517 is 71552602.

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

It is a cyclic number.

It is not a de Polignac number, because 20625517 - 2¹¹ = 20623469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625547) 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, 2808 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (2827584).

Almost surely, 2^20625517 is an apocalyptic number.

It is an amenable number.

20625517 is a deficient number, since it is larger than the sum of its proper divisors (1995155).

20625517 is a wasteful number, since it uses less digits than its factorization.

20625517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 20625517 is about 4541.5324506162. The cubic root of 20625517 is about 274.2426190328.

The spelling of 20625517 in words is "twenty million, six hundred twenty-five thousand, five hundred seventeen".