20425616 has 20 divisors (see below), whose sum is σ = 39718812. Its totient is φ = 10175616.

The previous prime is 20425607. The next prime is 20425637. The reversal of 20425616 is 61652402.

It can be written as a sum of positive squares in 2 ways, for example, as 20070400 + 355216 = 4480^2 + 596^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510 + ... + 6866.

Almost surely, 2^20425616 is an apocalyptic number.

It is an amenable number.

20425616 is a deficient number, since it is larger than the sum of its proper divisors (19293196).

20425616 is a wasteful number, since it uses less digits than its factorization.

20425616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658 (or 4652 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20425616 is about 4519.4707654769. The cubic root of 20425616 is about 273.3537614450.

The spelling of 20425616 in words is "twenty million, four hundred twenty-five thousand, six hundred sixteen".