20425668 has 12 divisors (see below), whose sum is σ = 47659920. Its totient is φ = 6808552.

The previous prime is 20425637. The next prime is 20425673. The reversal of 20425668 is 86652402.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851058 + ... + 851081.

It is an arithmetic number, because the mean of its divisors is an integer number (3971660).

Almost surely, 2^20425668 is an apocalyptic number.

It is an amenable number.

20425668 is an abundant number, since it is smaller than the sum of its proper divisors (27234252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20425668 is a wasteful number, since it uses less digits than its factorization.

20425668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702146 (or 1702144 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20425668 is about 4519.4765183592. The cubic root of 20425668 is about 273.3539934149.

The spelling of 20425668 in words is "twenty million, four hundred twenty-five thousand, six hundred sixty-eight".