20028735 has 16 divisors (see below), whose sum is σ = 35606880. Its totient is φ = 10681920.

The previous prime is 20028731. The next prime is 20028739. The reversal of 20028735 is 53782002.

It is an interprime number because it is at equal distance from previous prime (20028731) and next prime (20028739).

It is not a de Polignac number, because 20028735 - 2² = 20028731 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 = 20028699 and 20028708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74046 + ... + 74315.

It is an arithmetic number, because the mean of its divisors is an integer number (2225430).

Almost surely, 2^20028735 is an apocalyptic number.

20028735 is a deficient number, since it is larger than the sum of its proper divisors (15578145).

20028735 is a wasteful number, since it uses less digits than its factorization.

20028735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148375 (or 148369 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20028735 is about 4475.3474725433. The cubic root of 20028735 is about 271.5716974346.

The spelling of 20028735 in words is "twenty million, twenty-eight thousand, seven hundred thirty-five".