20225638 has 8 divisors (see below), whose sum is σ = 30415320. Its totient is φ = 10087200.

The previous prime is 20225629. The next prime is 20225641. The reversal of 20225638 is 83652202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 11808 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (3801915).

Almost surely, 2^20225638 is an apocalyptic number.

20225638 is a deficient number, since it is larger than the sum of its proper divisors (10189682).

20225638 is a wasteful number, since it uses less digits than its factorization.

20225638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25622.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20225638 is about 4497.2922964824. The cubic root of 20225638 is about 272.4587396497.

The spelling of 20225638 in words is "twenty million, two hundred twenty-five thousand, six hundred thirty-eight".