20189775 has 24 divisors (see below), whose sum is σ = 33548944. Its totient is φ = 10713600.

The previous prime is 20189759. The next prime is 20189777. The reversal of 20189775 is 57798102.

It is not a de Polignac number, because 20189775 - 2⁴ = 20189759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17517 + ... + 18633.

Almost surely, 2^20189775 is an apocalyptic number.

20189775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20189775 is a deficient number, since it is larger than the sum of its proper divisors (13359169).

20189775 is a wasteful number, since it uses less digits than its factorization.

20189775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 20189775 is about 4493.3033505429. The cubic root of 20189775 is about 272.2976080417.

The spelling of 20189775 in words is "twenty million, one hundred eighty-nine thousand, seven hundred seventy-five".