20425684 has 12 divisors (see below), whose sum is σ = 37626400. Its totient is φ = 9675288.

The previous prime is 20425681. The next prime is 20425697. The reversal of 20425684 is 48652402.

It is a congruent 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, 134304 + ... + 134455.

Almost surely, 2^20425684 is an apocalyptic number.

It is an amenable number.

20425684 is a deficient number, since it is larger than the sum of its proper divisors (17200716).

20425684 is a wasteful number, since it uses less digits than its factorization.

20425684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268782 (or 268780 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20425684 is about 4519.4782884753. The cubic root of 20425684 is about 273.3540647902.

The spelling of 20425684 in words is "twenty million, four hundred twenty-five thousand, six hundred eighty-four".