20425635 has 32 divisors (see below), whose sum is σ = 36840960. Its totient is φ = 10735200.

The previous prime is 20425607. The next prime is 20425637. The reversal of 20425635 is 53652402.

20425635 is a `hidden beast` number, since 2 + 0 + 4 + 25 + 635 = 666.

It is not a de Polignac number, because 20425635 - 2⁶ = 20425571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20425599 and 20425608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8520 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (1151280).

Almost surely, 2^20425635 is an apocalyptic number.

20425635 is a deficient number, since it is larger than the sum of its proper divisors (16415325).

20425635 is a wasteful number, since it uses less digits than its factorization.

20425635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20425635 is about 4519.4728674924. The cubic root of 20425635 is about 273.3538462033.

The spelling of 20425635 in words is "twenty million, four hundred twenty-five thousand, six hundred thirty-five".