20190775 has 12 divisors (see below), whose sum is σ = 27312984. Its totient is φ = 14684000.

The previous prime is 20190763. The next prime is 20190811. The reversal of 20190775 is 57709102.

It is not a de Polignac number, because 20190775 - 2⁵ = 20190743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36436 + ... + 36985.

It is an arithmetic number, because the mean of its divisors is an integer number (2276082).

Almost surely, 2^20190775 is an apocalyptic number.

20190775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20190775 is a deficient number, since it is larger than the sum of its proper divisors (7122209).

20190775 is a wasteful number, since it uses less digits than its factorization.

20190775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73442 (or 73437 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 20190775 is about 4493.4146258720. The cubic root of 20190775 is about 272.3021036030.

Adding to 20190775 its reverse (57709102), we get a palindrome (77899877).

The spelling of 20190775 in words is "twenty million, one hundred ninety thousand, seven hundred seventy-five".