20228735 has 8 divisors (see below), whose sum is σ = 24452496. Its totient is φ = 16064320.

The previous prime is 20228729. The next prime is 20228737. The reversal of 20228735 is 53782202.

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

It is not a de Polignac number, because 20228735 - 2¹⁸ = 19966591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20228698 and 20228707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14081 + ... + 15450.

It is an arithmetic number, because the mean of its divisors is an integer number (3056562).

Almost surely, 2^20228735 is an apocalyptic number.

20228735 is a deficient number, since it is larger than the sum of its proper divisors (4223761).

20228735 is a wasteful number, since it uses less digits than its factorization.

20228735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29673.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20228735 is about 4497.6366015942. The cubic root of 20228735 is about 272.4726454600.

The spelling of 20228735 in words is "twenty million, two hundred twenty-eight thousand, seven hundred thirty-five".