20625611 has 4 divisors (see below), whose sum is σ = 20659872. Its totient is φ = 20591352.

The previous prime is 20625599. The next prime is 20625617. The reversal of 20625611 is 11652602.

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

It is a cyclic number.

It is not a de Polignac number, because 20625611 - 2⁶ = 20625547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20625617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16211 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (5164968).

Almost surely, 2^20625611 is an apocalyptic number.

20625611 is a deficient number, since it is larger than the sum of its proper divisors (34261).

20625611 is an equidigital number, since it uses as much as digits as its factorization.

20625611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34260.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20625611 is about 4541.5427995341. The cubic root of 20625611 is about 274.2430356489.

The spelling of 20625611 in words is "twenty million, six hundred twenty-five thousand, six hundred eleven".