20425611 has 4 divisors (see below), whose sum is σ = 27234152. Its totient is φ = 13617072.

The previous prime is 20425607. The next prime is 20425637. The reversal of 20425611 is 11652402.

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

It is not a de Polignac number, because 20425611 - 2² = 20425607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425681) 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, 3404266 + ... + 3404271.

It is an arithmetic number, because the mean of its divisors is an integer number (6808538).

Almost surely, 2^20425611 is an apocalyptic number.

20425611 is a deficient number, since it is larger than the sum of its proper divisors (6808541).

20425611 is an equidigital number, since it uses as much as digits as its factorization.

20425611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808540.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20425611 is about 4519.4702123147. The cubic root of 20425611 is about 273.3537391402.

The spelling of 20425611 in words is "twenty million, four hundred twenty-five thousand, six hundred eleven".