20625563 has 8 divisors (see below), whose sum is σ = 23608032. Its totient is φ = 17652096.

The previous prime is 20625547. The next prime is 20625569. The reversal of 20625563 is 36552602.

It is a happy number.

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

It is not a de Polignac number, because 20625563 - 2⁴ = 20625547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625569) 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, 3731 + ... + 7427.

It is an arithmetic number, because the mean of its divisors is an integer number (2951004).

Almost surely, 2^20625563 is an apocalyptic number.

20625563 is a deficient number, since it is larger than the sum of its proper divisors (2982469).

20625563 is an equidigital number, since it uses as much as digits as its factorization.

20625563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 20625563 is about 4541.5375149832. The cubic root of 20625563 is about 274.2428229089.

The spelling of 20625563 in words is "twenty million, six hundred twenty-five thousand, five hundred sixty-three".